Bear in mind that even on the most powerful PC FFXIV still runs, & looks, like a game from a decade ago (even the DX11 version) due to the graphics & optimisation choices. SE has a pseudo-policy of ensuring that all players have a similar experience given that they play on cross platform servers. Until the PS3 is abandoned for good come 4.0 there won't be any major changes.

There is a genuine potential for FFXIV 4.0 to look, & play, exceptionally superior to what we currently have if, & only if, SE realise the potential of the PS4 (+Pro) & PC.