yup it vil lose quality

GT5p in gameplay is 1280X1080, in replay and menu's it is 1920X1080, and all running at 60fps.

Also yes, it's likely the game will be 720P/30FPS but I would not be suprised if instead it's 1280X1080 and 30FPS in 3d mode.

The best way to make the call is if GT5 has split screen mode. If it does, 3D will most likely run at the resolution of one split screen @ 30 frames per eye...

Doing split screen gaming ~= 3D for 1 player.

Aren't GT5:P replay resolutions 1440x1080?

http://www.eurogamer.net/articles/wipeout-hds-1080p-sleight-of-hand
wikipedia's source says it is.

I personally thought that the replays were full hd though.

GT5P used different display modes depending on context.

The showroom was the only instance in which it displayed at a native 1920x1080.

In game play was something like 1280x1080, using non square pixels, with the horizontal resolution stretched to 1920. Replay mode was a bit higher at 1440x1080.

No final word on the final version of GT5; maybe it's running higher since they've had an additional year plus to tweak the engine.

3D mode naturally will not match the same specs without something being compromised, whether it's frame rate, vertical resolution or whatever, but I'd be surprised if it was anything lower than 1280x720 @ 30 fps, which is hardly ideal, but playable.

I wouldn't be surprised if the actual 3D mode performed considerably better though.

it supports both.

but on 720p it have few graphics tweaks, like msaa x4.

everything at 60fps.

@disolitude

I think it will, I mean GT5 P had split screen