Personally I find the whole idea preposterous. Burning energy just so that when you walk into a room it plays a piece of music, instead of having to wait in unsuferable delay and go through all the effort of pressing a play button, is the empitome of wastefulness. I've seen reports of these wonderful customized houses, all guzzling energy to keep it just warm enough, or just cool enough, or just enough light. They won't work for multiple people. And anyone used to that way of living is never going to be able to cope outside of their mini little biosphere. What about when you have to go outside to pop down the shops, and it's 5 degrees warmer? Take your car one block with the aircon on? Or have everything delivered? Honestly, I despair at the nonsense ideas companies have to sell people yet more stuff. Image recognition to select a user? Because going through a list of 4 or 5 users is really that difficult and tiring??
Um, I'm gonna stop now before I really start ranting!