I'm coming very late into this discussion and haven't read everything said after this, but when I saw this comment, my first thought was...wow. Really? You REALLY saw no real productive use for it?
REALLY?
Is there some weird lack of imagination here? Because the minute I saw that this was going to be running apps off the app store--and the minute I saw the new iWork, all KINDS of real productive uses flashed to mind. Imagine doctors in a hospital carrying iPads. iWorks has that phenomenal chart system. All patients charts there. You can't flip through charts and enter in new data (doctors can't haul laptops around to do that!). And think of all the medical apps that already exist that could be put on the iPad--bigger, better. Doctors could email information to each other. All information shared, updated, calendar for surgeries, X-rays, test results....
Scientists. They could all have ipads in the lab. Again, charts, science apps., mathematical formulas. A laptop needs to be set down somewhere and opened. But this allows you to enter in data quickly, pass it around hand to hand. Businessmen, obviously, can use this for presentations and the rest. It's exactly what they wanted that the Macbook Air almost, but didn't quite give them--something ultra travel sized that'll entertain them as they travel but have all they need for the meeting.
Running a sports team? We saw how that could be used with a kid's soccer team, but why not professional sports teams? Plumbers, electricians, construction workers can have it to calculate estimates, check if they've got parts, order parts if they don't have them and, if the app exists, draw, design, or display what needs to be done to their clients there and then. Small businesses can use this for inventory....Students could keep all their textbooks on it. Year end, they don't need to sell back those textbooks. It puts an end to stuffing books in lockers or hauling them around in a backpack like turtle. With bluetooth keyboard, they can set it up and type in notes as on a "laptop" but it weighs less, cost less.
I'll grant that Apple is to blame for this in how they presented the device, but really, are games, movies and music ALL you can see this used for? Think about what apps are out there for science, engineering, architecture, business and suddenly this devise can fulfill all kinds of needs for all kinds of markets.