well what most people fail to realize is that crysis is only demanding "outdoors". play it inside the cave levels and you'll get performance near that of farcry2/WaW. and considering this rpg may not include such dense flaura per scene, and a scale much smaller than that of the crysis island (smaller view distance), our current rigs might actually hold up against this one.
the video sort of remind me of the old 3dmark03 ogres demo. ahh the good ol' geforce fx days.
Crysis was demanding because of all the vegetation. You take that away and suddenly CE isn't very demanding. In the cave sections of Crysis [warhead] - where there's little/no vegetation - my framerate was anywhere from 80 to 150. I use an average of "high" settings @ 1600x1200 on 8800 gt SLI.
That said, I didn't find that demo particularly impressive. I am not a big fan of the "Let's make everything dark and brown to make it look gritty!" color scheme, and orcs are not exactly the most innovative thing.