A great article from Shawn Blanc about MS and Apple having a bunch of the same goals with their tablets. They both want you to move past the thought that a tablet is for strictly consumption and it to a world where it's your primary tool all the time. Yes that means even for creating content.
Apple has answered, and is answering, the practical question through iTunes App Store and the plethora of 3rd-party developers. There are hundreds of thousands of apps in the App Store that are empowering people to build things and communicate with people in ways that used to be limited only to traditional computers.
Microsoft is attempting to answer the practical and prejudicial conundrums surrounding their tablet by allowing the Surface to run classic Windows applications and by shipping it with a keyboard and trackpad disguised as a cover.
I do a bunch of the writing for this site from my iPad but I can't design sites or chop up PSD files from it. I'd love to move to a world where I can use the iPad all the time, but it's just not quite there for me yet.