Comparing Crysis on Very High on both DX10 Vista and DX9 XP, I see no difference. With Gear of War, maxed out with DX10 textures gives me like 12FPS on my 3870, so it's not even playable. Even all settings minimum with DX10 enabled, it doesn't go above 30. DX10 was a complete waste for me. Thank God I only spent $50 on Vista, or I'd be PISSED.