[emiliobumachar]

If it implemented some requirements of your choosing with perfect accuracy, how would you go about automating any work other than flipping colors to contrast with background?

I'm not in the graphics design business, but I could only imagine applying that tool manually, in an interactive see-if-it's good environment much like the demonstration.

[andrewvc]

It'd useful for overlaying things on maps, or tagged things in photos etc.

For designers it's not very useful of course.