Also I think they should show some particle effects, NPC, etc. comparison.

wow guys, seems a lot of people here dont have good eye sight because I can see the difference that DX10 makes compared to XP with High Quality. But its not a difference that would make you buy windows Vista unfortunatly...T_T... I tried the demo a few days ago and man it looks good even in Low Quality...hehe I could barely run it on High on my PC...too bad, guess I'll have to wait until I get a new PC.