Nvidia is making .NET driver
YOU HAVE TO SWITCH you driver development to .NET if you want to prepare for Longhorn. ATI was criticised for its new Catalyst Control Center since apart from nice looking features its new driver brought slower execution. But we've learned that Nvidia is doing the same at the moment.
It's not that ATI just wanted to make an adventurous move - it's actually something that all graphic card manufactures will have to do sooner or later.