Without the ability to stream 99% of video on the internet (as in, everything but youtube for the most part), a terrible screen for reading (honestly, would you want to read a BOOK on your laptop or desktop? You'd have a crushing headache), and no actual ability to do any work via productivity software and the like, I'm not sure.
It can't do anything a laptop can't, or a netbook I should say, which can do a million times more. I don't see it's appeal personally. It can't fit in your pocket, so it's not exactly portable, and seriously, hate flash all you want, but it's what the internet uses, no getting around that, and yea, maybe an alternative may come around in a year, but it'll be another 6 months afterwards before anyone starts converting over to it, IF they convert over to it.