how long are you sitting in your car that you need a 15 inch screen for entertainment. are you a taxi driver? on the rare occasions when you have to wait that long, just get your ipad with you.
I often need to wait for a family member to do some shopping, or wait somewhere to pick a family member up. So yea if I couldn't use the large screen already built into the car, I would have to use an iPad I guess. Watching YouTube in the Tesla automatically turns off the headlights and dims the canopy lights which is nice. Total integration.