Problem is... like history has dictated thus far, by the time Microsoft get it right, Apple and Google will have again surpassed this modality to something far catchier and innovative again.
Apple set the benchmark with app based mobile phones, Google copied, Microsoft are still behind the times. That same app approach has been incorporated into Mac as standard, and Google's proposed OS will be something similar. Microsoft once again, trying to be different, tiles, not apps... lots of scrolling information, confusing for older persons... they just effectively drove a large portion of their market, IMHO, to Apple and Google OS (when it hits the scene)... who have a pretty picture as an app icon, you get to know that picture, you click it, then you access the program.
Nothing worse than having a screen constantly changing on you with information when you haven't even gotten past the home screen.
Then Microsofts audacity, believing every home is going to change their home computing to touch screens.