Saying this as computer gamer for better part of my life, there's helluva lot of PC people here smoking something that is not tobacco (to paraphrase Marcus Beer) - it would have no problem running on PS4 (look at official specs people before making random statements), and if devs are smart enough they would eventually self-publish it on PSN.
That said, of course it won't look as good as Titan 3-way SLI - it's just silly to think PS4 is anywhere near the level of highest end PCs even now in raw processing power, let alone in 2 or 3 years from now.
At the moment AMD cards don't run as good as nVidia cards on Crytek's engine, 7870 level card performs around 660 level, which is still some 70% more than what game requires at the moment. This will most likely change in future, given that 7870 usually performs at 660Ti level (or some 15-20% better than 660), and 7850 performs same as 660.







