I may be in the minority, but I love desktops. For me the only true computer is a desktop. I don't even like laptops and I don't think I would be able to get anything done on an iPad. The iMac is the only thing I use apart from my phone. My work doesn't involve anything that requires extra computing power either, it's just a preference of mine that I've pretty much always had.
I love being able to use a mouse and a standalone keyboard. I don't like using anything integrated, not even a touchpad. I guess I'm just old school.
Well obviously I can't use a mouse with my iPP, but I do have a separate keyboard that I use with a stand when I'm at my desk. It makes it feel a bit more like a desktop when I need to be using it that way, but it's still a grab and go tablet when I wanna take it with me.
I think I'm just so spoiled to it always being on and ready to go. Working with this laptop from home now, I get frustrated waiting for it to start up.
If I had to use a computer though, I'm definitely a desktop kinda gal. I'd be iMac all the way.