It’s worth noting that Metro is more than just a new look, and more than just putting touch first. Metro apps have similar restrictions to iOS apps. According to Jensen Harris, for example, Metro apps will get “about five seconds” after they’re no longer on-screen before the system puts them into a suspended state. There’s no file manager. Users no longer quit (or, in Windows parlance, exit) apps explicitly. These tradeoffs sound familiar?
...Did you (and the parent poster) simply read the Gruber article until you could find something to nitpick, then go with it?
Which, again, proves he didn't watch the keynote. At one point they brought up the scenario of using a tablet on the couch and then, after finding a bug, being able to pull up Visual Studio on the same device. Even the tablet they gave out came with VS installed on the device.