Xbox's Director of the Game Technology Group, Scott Henson, had his doubts about Sony's claim that PS3 games will feature 'full HD' (1080p resolution): "I think 1080p, just to address that directly, will be basically impossible. I think if you talk to any developer they will tell you that they will not have a performing game at 1080p."
In fact, I'll stick my neck out and predict that that you won't see any 1080'x' games for the PS3 this year..." And later in his blog: "As to games, 99% of PS3 titles will natively render at 720p; the few that come out with 1080'x' support are either going to be simple classic arcade ports that don't need to render complex scenes (think the original Battlezone), or will give up a lot of in-game visual effects and simply won't look very good