I don’t see the advantage, 15 minutes is probably longer than the average shower, and many can be in and out in 5 minutes. If they could work it out for express cleaning, 5 minutes or less then maybe it’s a neat idea that could have applications for institutional living, military etc.

$400 000 price tag. Ouch.

Make it brush your teeth an apply skin care and it's a winner.

This is a homage to the same idea, demonstrated by Japanese companies at world expos decades ago.