Only with no AA. If you have at least 2xAA on 1024x768, the difference won't be that big when you bump it to 1280x1204. However, since I can't use AA on 1024x768 because of my video card, I thought I could increase it to 1280x1024 to decrease the jaggies. It looked great, but smooth play was out the window.
I upped my OC'd 3dmark05 score from 3,691 to a 4,539 with the beta drivers. I had 66.70 from nVidia, before using the betas. You plain 6800 users should try the 16 pipeline softmod on another thread, it upped my score even more to 5,052!!!