The PS4 client is NOT going to simply be the PS3 client reskinned. It's going to be closer to the PC client. Since it's a brand new build of the game on a brand new system it will require a 2-4 weeks of testing to work out wrinkles. This isn't beta testing the game persay just beta testing the new client. Wouldn't want to launch the PS4 version and find out there's a massive graphical glitch or something. Plus they'll probably hand out some beta keys to try and drum up more subs. I remember the FFXI Xbox launch. Major sub increase then.