I don't know about all the DX10 features, but some people have found out that doing some stuff to the config files can enable a couple of DX10 features in Windows XP.
---
Anyway, my system can just barley handle medium settings, lol. My 7800gt is probably swearing at me as I ran the game. (20-30ish fps with medium settings, no AA, 800x600)
I'm impartial about the demo. I'm very impressed that the same people who made the (in my opinion) piece of crap game called Far Cry are actually making this game. The voice acting is actually good (not the most amazing, but still MUCH better than Mr. Jack Carver) and the health regeneration (at least on Normal difficulty) offsets the fact that the save system is still based on checkpoints.
However, the AI didn't really feel that good. Perhaps part of it is that I'm on normal, but I'd be swimming right next to a boat and the gunner didn't even notice me till I swam twenty feet directly in front of his field of vision. Maybe it's just because of the demo or something, but we'll see.
Onto the graphics. . . On medium, it looked like a less flashy version of Far Cry and obviously looked like crap compared to the full graphical prowess that this game can promote.
Now, I haven't gotten all the way through the demo yet (had to stop after a little bit for class). I don't think I'd buy this game unless I had a high end 8800 or whatever else comes out in the near future and if I had that, I'd probably be required to get Vista too unless the DX10 features don't make it that much more amazing than DX9.







