^
dunno, I only have XP so I can't test DX10 stuff.
I'm about 3 1/2 - 4 hours in and I'm having trouble playing it anymore. The story is really what is keeping me playing because I'm actually rather bored with the combat. The enemies feel like more of an annoyance than anything and while the plasmids are really cool and all, it just doesn't feel all that satisfying for whatever reason *sigh* I really wanna like this game because it does so much so well but i'm just not as glued to it as I thought i would be after the demo oh well... back to jeanne d'arc
To much of anything is bad. Take a break. I never play games for more than an hour for exactly what you are saying. If you give it a break, your interest starts to build up again.