I think the iPad is going to find a rather niche market when all the hype settles down over it. For one, I agree that this is basically a larger iPod touch, which makes it impractical to carry around with you at all times, yet, misses the boat on the functionality you would expect in a larger device. Yeah, the apps and software may make or break it, I guess we all shall see, but as far as I can see it (and one poster here illustrated one such niche market), the thing is going to end up in the hands of:
1. Apple fanboys who would drink a pint of Steve Jobs' b**lsweat if they could
2. Rich, well to do urban professionals who always feel the need to have the latest and greatest gadget on the market, so as not to lessen their chic status.
3. Medical professionals who will recognize the potential of this device to offer a much more integrated charting system for their patients, one that can be synced with a central server to allow for real-time updates, doctor's notes, and other things. A far cry from the traditional trendy "Apple-head" macbook toting urban artist type, but in this case it's more of a product driven market, than a market driven product.
As for me, I have an iPhone 3G, and an iPod touch, two laptops and a desktop computer (all Windows PC's). I have ZERO interest in this thing.