Oh yes it will definitely become the future. It will change laptops as we know them. Use it as a 11,13 or 15'' screen for portability and then when you get home, plug it into the keyboard dock (landscape or portrait) and use a magic mouse to do some ''real'' work. Then all it will need is things computers have now such as iSight and a microphone, and then we have ourselves a laptop killer. Use it as a desktop with a cinema display, use it as a laptop whenever your away and want to be as productive as possible, and use it as a tablet whenever you want the best form factor possible! EPIC WIN!
Yeah this is a pretty good vision. A small sleek pad with a touch interface that can be docked at home and at work, but still be highly functional in an amazing weight and size package while traveling.
The idea of people carrying around large laptops is going to be as funny 20 years from now as seeing people with mobile phones in the early 80s that were massive.