It's a rare thing when both major graphics chip companies release new driver updates on the same today. Today is one of those rare occasions where owners of Nvidia and ATI based cards can download new drivers. ATI's Catalyst has their regular monthly update with the 8.10 driver release. The release notes give all the details on what's new and improved in this driver update

Nvidia has also released new official drivers (174.28) for its various GeForce graphics chip products. There doesn't appear to be any release notes yet for this release but these are WHQL approved drivers so it should be OK to update your PC with this new release.