According to Joystiq , PlayStation 3 games in 3D will have their HD resolution capped. While demonstrating the newest version of the system at the Develop Conference,  Sony representative Simon Benson announced that games that run at 1080p resolution will be downscaled in 3D mode -- per eye -- to 720p.  

Speaking to Joystiq, Benson stated that although the PS3 has the capability of displaying a 1080p image, a  resolution higher than 720p has been restricted because Sony contends that a higher frame rate would impact the quality of viewing.  

Blu-ray movies will retain the 1080p resolution.  Blu-rays run at 24 frames per second, but games run at 60 frames per second -- upping the resolution for games would compromise the smoothness of the frames.  While a "more cinematic game" could be equipped to handle the 1080p resolution at the cost of frames, Sony's current guidelines won't allow users to change settings, Benson said.

A true 1080p image consists of 2M individual pixels, about twice the amount shown in a 720p image. Benson added that even trained computer graphic artist could barely tell the difference between resolutions.

On the Newbies Inc. website, Benson indicated that  that online gamers with a 3D TV may have a competitive advantage over those playing on HD sets.

"It all depends on the gamers to be honest. Initially we were slightly concerned about this because we were thinking, what if it makes it twice as easy or something like that."

He also stated that 3D can have the effect of making games more accessible for inexperienced players.

"I think what’s basically going to happen is that anyone who has stereoscopic 3D televisions and, for example, is playing a driving game, I would imagine you’re likely to find that the accessibility level is higher, that people would generally perform better on their first go. But I think at the high end with the hardcore gamers you’ll still see a [3D] advantage there, potentially, but the margins will be far smaller."