It would be interesting to see a tablet sized dual mode device where the OS and user apps could seamlessly switch back and forth between a 100% touch mode UI an

It would be interesting to see a tablet sized dual mode device where the OS and user apps could seamlessly switch back and forth between a 100% touch mode UI and a 100% precision pointing mode UI without restarting or losing data. It would mean a lot more work for developers though if your app needs two different UI designs. One issue that sticks out is that touch controls of a usable size just take up so much more screen space. Also, look at how many years it took Microsoft to provide touch friendly access to the Windows control panels.