I've had some time to spend with my buddy's iPad....
I also have a Toshiba tablet PC (given to me...I would have never bought one). Comparing the iPad to a tablet PC is like comparing apples and oranges. They don't do the same thing and both work completely different. Having used both, I can assure the iPad is nothing like a tablet PC...nothing.
With that said...I will be getting one...soon.
Before you all start throwing "apple fanboy!!!" rocks at me...let me explain.
I need a mobile, around the house web browser...and little else. Sure, I might use the iPad for a few other things but for the most part, it will be a convenient, portable and extremely quick web browser. For those that haven't used one, it is fucking fast with internet use...and I mean fast. Even over my wireless G network here at home, it is screaming fast. I guess it's the clean OS that allows for this. I use the internet constantly for many things...I could go into detail but I'll just leave it at that. Having something that is extremely portable, silent, fast and having such a long battery life being moved from room to room is very appealing to both my wife and I...having a very mobile 2 year old also makes a stationary desktop difficult to use much of the time.
Now...some would ask me why I just wouldn't get a laptop...well, that's a valid question. I don't need a laptop nor do I want one. I have a full featured desktop to make my movies, edit my pictures and to do other complex tasks I wouldn't do simply sitting there on the couch. Hell, even a small laptop is weighty, awkward, hot and require more charging that the iPad offers. Most laptop's mouse pads are shit (I normally use a separate mouse when I'm on the road...something I would do around the house) As for Apple laptops, don't get me started about how much they are...yikes.
I think the iPad fits a small market. It will sell well because of the piece of fruit on the back of the thing but in some people's life (like mine) it will be well used.