I can see 2 major group of people that

will be pushing this towards.
1. The commuter. The ability to get newspapers and magazines, carry your books, check your email, and do a bit of light work on the commute to and from work, all on one light, portable device. Instead of stopping for a paper on the way to the train (subway, bus, whatever), you download the NYT or WSJ while your walking and it's ready to read when you sit down. You can exchange emails with your colleagues, pull up a document or excel spreadsheet on the way in and make some minor edits.
2. The college student. No more going to the bookstore, hunting through the maze of shelves, waiting in line for an hour to pay $1200 on books for your five classes only to sell them back 4 months later for $150 (if you're lucky). You pick up your tablet, type in the titles, and less than an hour later you have 5 textbooks with interactive features (videos, self tests, submit homework to profs online, interact with other students on forums) for $600.
You bring your device with you to class and you have your interactive textbook with you, can take notes, and yes browse the web and play games when you get bored (I do know my students well enough to know this will happen!). No more lugging around heavy textbooks, notebooks, pens, etc., just pick up your tablet and go.
If they can somehow make it so that as I'm lecturing from a keynote or powerpoint presentation, my students can see the slides on their tablet and can take notes right on the slide as it comes up that would be huge! Even better if they can implement a clicker-like interface so I can pop up questions and have my students respond on their device over wi-fi.
As long as this tablet has the ability to do, at the very least, light productivity work with iWork/Office, $1000 is a fine pricepoint. My students would, on average, just from textbook savings alone, make up the cost of the device in 3 semesters.