The screens are all too small, and even for a smaller Windows Tablet, windows just don't really work. I ran everything maximized with 640x480 displays, even 1024x768. Although, by then you could conceivably have two windows open.

Maps is especially inexcusable. I often use it for the hard parts, like how to get to the Interstate. After that, I want it gone to not drain my battery. It's often used in the car by the driver, it should get out of the way as quickly as possible.

One thing we need is for the interfaces to be consistent. I'm often not sure what the triangle will do. Is it a back button? (That will close my widget?) Is it a menu close button? Why do developers hate the back button, anyway?

There are gestures. They're not exactly discoverable, though. It's like we've gone through the command line, to GUI, now we're building a GUI with the drawbacks and power of the command line: Bad discovery, but once you learn it's power it's powerful.