As an additional screen to a mac, yes, there are severals apps for that, however they all require 3rd party kernel drivers on the mac so they will most likely break on major updates and they will probably be discontinued at some point.

They work reasonably well for web browsing and development, but I would not use them for photo or video stuff.

If you're using a macbook, check out the app astropad. It was a bit laggy with a macbook air though.

You mean like a Surface Pro? No, I don't think so.