Theres only a single major title that Sony has which will give them a good implementation of 3D at present. That title is Gran Turismo 5. Currently the game renders at 1280 by 1080 with 2x MSAA so if it can render at 1280 by 720 with 4x MSAA then they can probably also render at 1280 by 1440 to give an effective 1280 by 720 @ 60 FPS 3D. It can also be scaled to 2 or 4 consoles to yield a faster framerate and higher resolution output. People who don't like racing games will not get much benefit from PS3 3D because outside of this one title the games run at 720P and 30FPS which isn't sufficient to really do a good 3D implementation. I believe this is the reason for GT5's delay.
Sony's problem here is the major 3D gaming market is on the PC. Both AMD and Nvidia have or will support even greater levels of 3D like for example 120hz on ALL titles with major legacy and future titles supporting this technology. Its probably not worth it to buy the TV and glasses for just a few good examples.
As far as the Xbox 360 is concerned, if Microsoft were serious about 3D they could update their hardware in a fairly cheap fashion to yield the performance and the HDMI 1.3/4 output they need for serious 3D and they could transform legacy titles into 3D supporting titles as they have tighter control over how developers use their system. Quite frankly all they would need is to double the frame buffer size and give the console about 50% more texture units/stream processors and double the ROPs. Of course this asks whether or not they are serious about 3D and at present this market is small.
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