[nop]

I can imagine a non-lethal version of that could be pitched to prisons in the future assuming it could be made to be reliable. No need for giant walls and several layers of perimeter when you have a virtual walls to keep the inmates from escaping.

[dmix]

I'd imagine implanted chips are more easily removed then it is to get out of a walled prison. Prisoners have devised clever ways to hide and remove things from their body in the past.

[gojomo]

Prisons beta-test surveillance/confinement/contraband policies for airports. Airports beta-test for schools. Schools beta-test for everywhere, in the next generation.