When I got my ipod touch about a year ago, I also got an HP Touchsmart PC. I lamented at the time that Apple didn't have a tablet for me to buy, because I would have loved to just get something just like the ipod touch, but with a bigger screen and a keyboard accessory. The touchsmart seemed the best existing alternative, and it has turned out to be a huge disappointment. They say it has multi-touch, but it doesn't work. Everything a touch screen is really good for (besides handwriting), it does really really poorly.
With all the Internet buzz about the iPad, most of the commentary has missed what I think is the real point. This device is not everything to everyone. It does a limited number of things--the most common and pervasive things people need to do on-the-go--and it does them better than anything else. People keep comparing it to the *capabilities* of a netbook rather than the actual usability of a netbook. As someone who has owned tablets from Fujitsu and HP as well as a netbook for many years, I can tell you they ALL are horrible in terms of responsiveness.
People are disappointed it doesn't multi-task, it doesn't have a camera, and its software is tightly controlled by Apple. In my mind, these are the very design choices that let Apple make something that works so well. Multi-tasking on my PC is great, but also means that most of the programs I install try to slip an applet into the taskbar, squandering system resources and making the everyday things I do stutter and pause. It's just not worth it.
So, there. Call me a fanboy, but I'm excited for the iPad.