According to The Sixth Axis, confirmation on the resolution of 3D games on the PlayStation 3 have, well, been confirmed. Unsurprisingly, they'll be capped at 720p, not that there are a lot of games that run in 1080p in the first place.
Those that do adopt the new 3D tech won't be disappointed though. Games like Killzone 3, Gran Turismo 5 and Motorstorm: Apocalypse have proven that games do look pretty incredible in the 3rd dimension. Sony had a plenty of these games running in 3D at their E3 booth.
Sony has been pushing their 3D tech and TVs quite fiercely along with the PlayStation Move. Seems like it's their next step in their plans for
world domination offering a unique PlayStation brand experience.
Source: The Sixth Axis