My SP2 is a laptop replacement. I use it all day long (in and out of the office), and when I get home in the evening I exclusively use my desktop, which is a beast. The other two SP2 owners I know use it in the same way, but neither use a desktop at home.
It amuses me when, as a Surface user, I'm pigeon-holed by people who've never used one.
I could indeed. My desktop has three 24" IPS panels and a Das Keyboard, so obviously I like that more. The mobility of the Surface is the killer feature though, because I fire up Visual Studio on a 10 minute tube ride and code out the framework for a new feature, fix a bug, and so on. I love that desktop, but I'm more productive on the Surface because it's just always there.
It amuses me when, as a Surface user, I'm pigeon-holed by people who've never used one.