[myko]

Super Mario 3D World is 1080p (I took your 'REALLY HD' to mean you didn't realize Mario was already in HD), it's also the best co-op multi-player experience I've ever had:

http://www.yoyo.com/p/nintendo-super-mario-3d-world-934466

[oneeyedpigeon]

Unfortunately it's only available on a console that nobody has, which might explain why the OP wasn't aware of it.