Difference between concept and implementation I'd assume. Floor material would have to be cheap and/or very durable to be practical in the real world, and insta

Difference between concept and implementation I'd assume. Floor material would have to be cheap and/or very durable to be practical in the real world, and installation, replacement/upgrades would cost a lot in time, labour and inconvenience. Camera on the wall is quick, easy, doesn't have to deal with the wear and tear usage of a floor, and gives a good enough solution for the problem.