For small screens, it preserves a lot of real estate. When most notebooks are limited to 1366x768 screens, it's an excellent choice.

Thanks for providing some insight. I guess that's not a concern for me, since my laptop is 1920x1200.

To emphasize, it preserves a lot of vertical real estate.

Yes, really.

Fair enough, but most people are using Ubuntu on a desktop or laptop with moderately large screen (or is 1366x768 on a laptop considered small?)

Can you actually run Ubuntu on a phone yet?