An anonymous reader writes "Cable operators at the semi-annual CableLab's Innovation Showcase have informally voted as best new product a gizmo that can determine how many people are watching a TV. Developed by Israeli company PrimeSense, the product lets digital devices see a 3-D view of the world (the images look like something from thermal imaging). In other words, that cable set-top box will know whether three people are sitting on the sofa watching TV and how many are adults vs. children. Do we really need cable and/or video service operators knowing this? It all happens via a chip that resides in a camera that plugs into the set-top box."