If you want to see your performance in Batman: Arkham City jump by 17.6% and your Dragon Age 2 and S.T.A.L.K.E.R. Call of Pripyat increase about 10% then you want to upgrade to the newest beta driver from NVIDIA. There is more to it than that however, they have completely redesigned the interface of the Control Panel, now offering far more control over MSAA in a variety of games. There are new SLI profiles as well as updated 3D Vision profiles for those of you with the requisite components, which will enhance your experience in a number of games.
As usual there are also bug fixes, ranging from a fix for factory overclocked cards which occasionally downclock and refuse to come back, boot issues caused by Display Port adapters and a variety of game specific fixes. Head over to GeForce.com for your update.