As someone who has done UI for iPhone and iPad apps, I have to mention that you can get pretty small before it becomes difficult to tap what you want. And rare

As someone who has done UI for iPhone and iPad apps, I have to mention that you can get pretty small before it becomes difficult to tap what you want. And rarely is the touch sensitive area represented solely by the bounding box of the icon you're trying to hit. It's difficult to tell from that image how big they actually are. And there's no way to know that the actual release will look anything like that. However, a coworker of mine last summer was working with Win 7 touch, which was basically Windows 7 running on a touch sensitive monitor, and he seemed to think it was relatively easy to use.