What a jolly good idea too as everyone walking past could just blow a kiss at you and your camera would be activated and filled with pictures of people blowing kisses. What a nice world it would be.

Actually, it's not beyond the realms of possibility that some present day gear, could still be working in 2100, especially Canon L series lenses as they are rather finely built. But the digital bodies will be obsolete as no doubt some new technology will have taken over.