I'll post this here too.
The situation looks like this (to me at least, please correct me if I'm wrong):
My account is currently a Standard non-legacy 1.0 account
* You don't need to buy anything to play FINAL FANTASY XIV: A Realm Reborn when it is released on 27th August.
Will I get early access?
Yes. You will be able to play in beta phase 4 using your 1.0 character, which will be before release on 27th August.
Will I get the FFXIV:ARR pre-order bonuses?
No. Pre-order bonuses will only be available to players who pre-order either the Standard or Collector's Edition of FINAL FANTASY XIV: A Realm Reborn.
Will I get the FFXIV:ARR Collector's Edition in-game items?
No. Once FFXIV:ARR service starts, you will be able to purchase a 'Collector's Edition Digital Upgrade' that will upgrade your Standard 1.0 account to a FFXIV:ARR Collector's Edition account, and then you will receive the FFXIV:ARR Collector's Edition in-game items via Moogle mail to all your existing characters and any new characters you make..
I want the FFXIV:ARR Collector's Edition physical bonus items too!
You must purchase a physical Collector's Edition version on PC or PS3 to get the FFXIV:ARR CE physical bonus items. Doing this will also give you access to the pre-order in-game items.
- Buying the PC FFXIV:ARR Collector's Edition will not give you access to the FFXIV:ARR Collector's Edition in-game items. Purchasing the 'Collector's Edition Digital Upgrade' will also be required to gain access to the Collector's Edition in-game items.
- Alternatively, buying the PS3 FFXIV:ARR Collector's Edition and registering it to your existing account will give you access to the Collector's Edition items without the purchase of the 'Collector's Edition Digital Upgrade' as well as being able to play your characters on PS3.
My account is currently a Standard legacy 1.0 account
* You don't need to buy anything to play FINAL FANTASY XIV: A Realm Reborn when it is released on 27th August.
Will I get early access?
Yes. As a legacy account holder, you will have had access to FFXIV:ARR since beta phase 1, and will continue to get early access to the game.
Will I get the FFXIV:ARR pre-order bonuses?
No. Pre-order bonuses will only be available to players who pre-order either the Standard or Collector's Edition of FINAL FANTASY XIV: A Realm Reborn.
Will I get the FFXIV:ARR Collector's Edition in-game items?
No. Once FFXIV:ARR service starts, you will be able to purchase a 'Collector's Edition Digital Upgrade' that will upgrade your Standard 1.0 account to a FFXIV:ARR Collector's Edition account, and then you will receive the FFXIV:ARR Collector's Edition in-game items via Moogle mail to all your existing characters and any new characters you make..
I want the FFXIV:ARR Collector's Edition physical bonus items too!
You must purchase a physical Collector's Edition version on PC or PS3 to get the FFXIV:ARR CE physical bonus items. Doing this will also give you access to the pre-order in-game items.
- Buying the PC FFXIV:ARR Collector's Edition will not give you access to the FFXIV:ARR Collector's Edition in-game items. Purchasing the 'Collector's Edition Digital Upgrade' will also be required to gain access to the Collector's Edition in-game items.
- Alternatively, buying the PS3 FFXIV:ARR Collector's Edition and registering it to your existing account will give you access to the Collector's Edition items without the purchase of the 'Collector's Edition Digital Upgrade' as well as being able to play your characters on PS3.
My account is currently a Collector's Edition non-legacy 1.0 account
* You don't need to buy anything to play FINAL FANTASY XIV: A Realm Reborn when it is released on 27th August.
Will I get early access?
Yes. You will be able to play in beta phase 4 using your 1.0 character, which will be before release on 27th August.
Will I get the FFXIV:ARR pre-order bonuses?
No. Pre-order bonuses will only be available to players who pre-order either the Standard or Collector's Edition of FINAL FANTASY XIV: A Realm Reborn.
Will I get the FFXIV:ARR Collector's Edition in-game items?
Yes. Once FFXIV:ARR service starts you will receive the FFXIV:ARR Collector's Edition in-game items via Moogle mail to all your existing characters and any new characters you make..
I want the FFXIV:ARR Collector's Edition physical bonus items too!
You must purchase a physical Collector's Edition version on PC or PS3 to get the FFXIV:ARR CE physical bonus items. Doing this will also give you access to the pre-order in-game items.
- Tip: Since your current account will be upgraded to be a PC FFXIV:ARR Collector's Edition account, buying the PS3 FFXIV:ARR Collector's Edition would give you the physical bonus items as well as the ability to play your character on the PS3 version.
My account is currently a Collector's Edition legacy 1.0 account
* You don't need to buy anything to play FINAL FANTASY XIV: A Realm Reborn when it is released on 27th August.
Will I get early access?
Yes. As a legacy account holder, you will have had access to FFXIV:ARR since beta phase 1, and will continue to get early access to the game.
Will I get the FFXIV:ARR pre-order bonuses?
No. Pre-order bonuses will only be available to players who pre-order either the Standard or Collector's Edition of FINAL FANTASY XIV: A Realm Reborn.
Will I get the FFXIV:ARR Collector's Edition in-game items?
Yes. Once FFXIV:ARR service starts you will receive the FFXIV:ARR Collector's Edition in-game items via Moogle mail to all your existing characters and any new characters you make.
I want the FFXIV:ARR Collector's Edition physical bonus items too!
You must purchase a physical Collector's Edition version on PC or PS3 to get the FFXIV:ARR CE physical bonus items. Doing this will also give you access to the pre-order in-game items.
- Tip: Since your current account will be upgraded to be a PC FFXIV:ARR Collector's Edition account, buying the PS3 FFXIV:ARR Collector's Edition would give you the physical bonus items as well as the ability to play your character on the PS3 version.
As I said, this is just how it seems to be for me, so please correct me if I'm wrong and don't take this as a definite answer.