Microscope question

So I've heard about little microscopes you can connect to your PC and view on your monitor.

Is there (as yet) one that kind of has it's own screen?
Like, you hold it up to something and the bit that faces you displays what it's looking at?

Just figure it would be nice to have something portable that I didn't need to stick my face right into it.

So please, if you know of any let me know.

If no such thing exists, it really ought to.