I have a Laptop with a geforce GTX260 and a quad core and crysis runs all settings on very high and my pc completely destorys the game... It looks beautiful. alot of the effects can be done in 3dgs. but the sheer number of pixels that crysis pushes is almost impossible to do in 3dgs. The real-time ocean shader is complex...not just a plane with some effects. I could imagine some active terrain deformation to immitate the ocean shader. Ive seen some recreations of the shader but i dont remember where. HDR(not real HDR) is already possible with Shade-c. Motion blur on the other hand i have yet to see much about but im positive it is possible but not in the same fashion that it is implemented in crysis. Detail mapping has been around forever and is possible in 3dgs without really compromising frame rate. Theres a whole number of other effects that go on in crysis that i havent mentioned. alot of them are possible...but all at the same time would take some serious shader optimization.