My wife hardly ever touches the desktop (mac mini) at home, she pretty much uses her iPad for everything, notes, emails, web browsing.

In fact, when I've gone away with work I'm not even allowed to take it because it's all she uses, so I have to lug the laptop around with me instead - and all I use that for when I'm away with work is web browsing.

Like Andy I use my computer for coding, but then that's the most appropriate device for that particular task, pretty much everything else is done on the iPad (when I have access to it!).

YMMV.