well its a limit of hdmi1.3 as well so its not a surprise
If you're just dying to play 3D games on the PlayStation 3, you might be interested in the latest tidbit of information Sony let loose about 3D gaming on its console.
Sony on Friday confirmed that, when playing 3D games, the image on the screen will be limited to a resolution of 720p. Joystiq reports that even games that usually run at 1080p will be scaled down to fit this guideline.
Though the PS3 is capable of 1080p 3D playback, Sony's Simon Benson said that the higher resolution would mean sacrificing the 60 fps available with 720 (compared to the 24 fps for Blu-ray movies). Benson went on to assure his audience that most gamers probably wouldn't be able to tell the difference, as trained computer graphics artists barely could.