How to use PhotoSphere properly; a rotating camera mount.

So... I just kinda thought of this, I'm sure I'm not the first. There's all sorts of portable tripods for cameras and smartphones:

However, what we really need... is a tripod with a camera mount that can be wound up 360 degrees and when released it will slowly rotate at a constant speed a full 360 degrees back to its original position.

I don't think it would be that hard to make, and think of the photosphere opportunities!