I do computer repair, I bought the 16 GB (actually my GF bought it for me) wifi version of the iPad, and I got a Clear wireless router / modem that I can carry in my pocket to have constant internet at 4G speeds. I love it.
I take it to clients, I'm able to use internet that doesn't completely suck, search for answers, use TeamViewer, access their networks, routers, and other hardware. SSH into other machines, I read my tech news with Mashable and Flud, Stream my own video content with air video (awesome app by the way), watch Netflix wherever I am, and read on iBooks! I have a few games, but I didn't really purchase it for that reason.
I use it for email, web surfing, checking the weather, blogging with the WordPress app is up soon, and I just keep finding more and more uses for it. I'm sure it will grow even more over the next year, and particularly with the next rev. I do agree that I'd like to see iOS grow a bit, and become more customizable honestly.