Shame - someone needs to beat the iPad
In a sense, it's a shame: the iPad isn't quite so revolutionary, in that most apps are basically the iPhone version either bolted side-by-side (folder/item or menu/item), or fullscreen 'HD'. No sign of Minority Report or Avatar swooshing and sweeping there!
It's a fair point about the competition, however, and Linux hobbyists aren't well-known for their ability to muster the level of UI innovation and polish that would 'make' such a device. I guess it's up to Google or perhaps Microsoft(?!) to come up with the really innovative stuff then - 3D, smoothly-rotatable tag clouds from search terms, 3D rotatable hyperlinked & overlaid world maps (Hmmm...), etc.