Threwing my 2 Cents in,
I would love it on a PS3 for many reasons.
-Keyboard and mouse accessible with the PS3. Not only that it has a input Voice system as well.
-I love my PS3, Final fantasy was breed into the sony console. (My first FF was on the nintendo console's but my obsession began after FF9 and FF7 for the PS1, then jumped onto the other handheld versions, even the classics for the PS1).
-Final fantasy series, have been so flexible and amazing on the Playstation console. From my experience and point of view. Even loved and enjoyed playing FFXI Online on the PS2, it was perfect and amazing; although I do fear ONE thing, that that PS3 has shit servers.
Only thing I can say is, I hope they have their own personal server. So we don't have to use the PS3 Servers, cause the PS3 servers are horrid from experience. Unless you have the PS3+ (Plus) Which doesn't make much of a difference imo.
Plus it be nice to have a back up console that is supporting FFXIV, for those that travel and can't carry a Desktop, or don't want to play on a laptop. Although it would be amazing to play it on a 32' or higher TV /snorts all geeky/ I'd so take a picture standing next to my avatar with a 52' TV XD yeyeye!