I've always thought this would be the ideal design for an e-book reader. But Microsoft, being a business-targeted company, took the logical step of making it an e-planner instead. Nice.
I can't imagine it being used by anyone except well-off business executives, since the color LCD touch screens alone put its price well outside the average person's budget. But the user interface shows some real original thought, like the pie menus and the ability to cut-and-paste by circling chunks of the screen. If only they'd show us some kind of non-pen keyboard interface as well, I'd be sold in a heartbeat.