The way I see it: one of the things that makes the iPod Touch and iPhone great is the app store. It's an ecosystem where developers with a cool idea can create it and be discovered (the last part is important) and be profitable as well.
the iPad only extends this. Developers now have more screen real estate to work with and more processing power. We're going to see some cool innovations, I'm sure of it.
Also, the thing is half-a-freakin' inch thick, weighs 1.5 pounds and starts at $500. Who can complain about that? Let's be realistic, these things are going to sell like crazy. (personally, I'll be waiting for second gen b/c I learned my lesson with the iPod touch, but they're still freakin' sweet and if I wasn't a broke student (
http://forum.calgarypuck.com/showpost.php?p=2290111&postcount=52) I would be all over this.