I feel like we just keep swinging back and forth between handheld input devices and cameras for gesture control. I thought cameras were cool because they didn't

I feel like we just keep swinging back and forth between handheld input devices and cameras for gesture control. I thought cameras were cool because they didn't require me to put some weird thing on to use my computer, but now this is cool because it works at a higher resolution than gesture-control cameras. Who's going to up the ante?