If you think a $100 keyboard case makes an iPad into a real computer, I'm not sure you've used a computer before.
A $100 keyboard case turns the iPad into as much of a computer as most people need. What do you think people are doing these days that requires a "computer"?
If you're like most people, you'll check your email, visit your social networks, flick through your favorite apps, maybe some games, and then you'll watch movies or listen to music.
I don't see what Surface adds to help anyone in that department. It might get the Office crowd all jazzed up in theory but if I crunched spreadsheets all day, I sure as hell wouldn't be doing it on some crappy ARM Surface device.