Comment by __MatrixMan__

I imagine a something like a headlamp except it's a projector and a camera so it can just light up where it wants you to pick something up in one color or where it wants you to put it down in another color. It can learn from what it sees of my hands how the eventual robot should handle the space (e.g. not putting heavy things on top of fragile things and such).

I'd totally use that to clean my garage so that later I can ask it where the heck I put the thing or ask it if I already have something before I buy one...