However, most of the Windows 7 reviewers are power users. The real proof will come when your mom takes a Windows 7 PC for a spin and finds it easy to use. The real proof will come when teenagers determine that Windows 7 is as cool as Apple's OS. The real proof will come from word of mouth recommendations for Windows 7 because it's easy and looks good.
Bottom line: Despite all the screencasts, benchmarks, how-tos and other tutorials we just don't know how Windows 7 will do until it hits the marketplace. You can substitute consumers for chief information officers and the Windows 7 impact boils down to "we'll see what happens."
Perhaps that's why Ballmer's recent barnstorming tour is partially focused on lowering expectations for Windows 7. He's not quite sure how it'll turn out either. Windows 7 rests in the hands of your mom and millions of consumers everywhere.