Daily UI #004 - Calculator

For today's #dailyui shot, I decided to not focus too much on flashy visual design but just think about how to do a calculator on an Apple TV. I just can't think of a reason to design a calculator for mobile or desktop, given the amazing (and sufficient) options that are out there.

How it would work:
- slide sideways to select a number
- up for plus, down for minus
- click to reveal other buttons (division, multiplication, etc)

And that's it! This is the best I could come up with in an hour. What would you do differently?

Caveats:
I'm pretty sure this app sidebar approach isn't possible with current Apple TV standards, but I decided not to worry about that. :)
I'm not sure there's a good use case for this calculator, can you think of one?