I'm going to buy it and here's why.
I'm currently using a laptop (windows), and an iPhone. My laptops battery life isn't great, and it's not touch screen, it's heavy, and it gets hot.
My iPhone is great because I have YouTube, basically a full functional web browser, multitouch, etc... but the screen is too small to make it your casual couch browser.
I want something that I can sit on the couch with, or lay in bed with, that has a nice clear screen, multitouch, good battery life, and a ton of useful apps, something that I can browse macrumors, engadget, and other blogs, etc.. and here's the answer. (or rather... here's the answer for me.)
People that aren't impressed with the apps that were shown apparently don't realize that the SDK was just released yesterday. Once developers get their hands on the raw power that this little device is capable of, I believe you'll be seeing FAR MORE IMPRESSIVE apps created than those that have lived on the iPhone or iPod touch.
I'm excited... I guess not as much as I COULD have been. But I think, in its first iteration, that the iPad is a solid buy for me. (I'm just going to get the 16gb NON 3g.)
I don't see a need to pay extra for the 3g model, because I don't see it leaving my house very often. And if it does leave my house, I'm rarely away from a Wi-Fi connection. If I need to access apps/web/youtube/etc on the go, well... I have my iPhone that I have been getting by just fine with.
At a $499 entry point, how could you go wrong? I was going to spend that on a ***** windows netbook, and now I have a sexy iPhone on 'roids that looks much more elegant, and it's a familiar interface to me because of my iPhone.
I'm excited for the iPad, and maybe even more excited for next gen iPhone (with the combo of OS 4.0)