Browsing Nokia C7 with bluetooth optical mouse

Have you ever seen a phone that doesn't require one's finger to navigate? Pretty cool right? Well Nokia C7 has the ability to do just that, or the mouse rather. Check this video which shows just that.

Ofcourse if you are outside, you wouldn't need the mouse when you are using the phone. You would look foolish and cool at the same time, in short you would look like a FOOL. Anyway what do you think? Is it practical to have a mouse for that? I don't think so.