It's important to keep in mind that the Metro apps work better on smaller screens than normal desktop apps. They hide a lot of the UI when you don't need it, so

It's important to keep in mind that the Metro apps work better on smaller screens than normal desktop apps. They hide a lot of the UI when you don't need it, so there's much more room for actual content. I wouldn't want to run, say, IntelliJ Idea on a Surface, but for many other apps, the screen size is not much of an issue. Also, you can dock the Surface when you're on a desktop, and use a larger screen.