First of all, no family I ever knew of stopped 30 minutes every 2.5 hrs to shop on a long family road trip. With my dad, you might have gotten to stop at 4 hrs. unless the trip was only 5, then you'd have to just hold out. The second point is... do you think you could drive confidently to the end of your charge, without fear of running out, knowing that you had the proper recharge availability ahead, to the point you could cut it that close? Wouldn't you need to kind of factor in a safety zone, so that you don't (heaven forbid) lose your power along the interstate? I don't imagine that would be easy to fix.. it's not like Goober can hook his jumper cables up and have your Tesla on its way. I'm sure they would have special charging trucks, but how many and where? Suddenly, you think everyone is going to invest in these out of nowhere?
Not to mention... there are ranches across Texas that take more than 2.5 hrs to drive across. The same for Montana and Wyoming... and Alaska? Forget about it.
Well you know, before they had cars, horses had to rest sometimes overnight, before traveling on. Eventually that's what we'll be back to, because the even bigger point is completely being ignored. Right now, electricity is cheap and plentiful, in the Liberal Utopian world where everyone drives a Tesla, the demand on electricity would cause the price to dramatically increase. The real problem is going to be when you have to PAY for the recharge. OR.. when your Tesla doesn't quite make it to the next available recharge station, and you have to PAY the recharge truck. On top of the $50-100k investment, you'll have the cost of electricity. Now, your home electric, it will increase gradually over time, as more and more people demand this idea, so it will be the most viable option... but you can't always recharge at home, you will need recharge stations which will be operated by capitalists who are in business to make a profit. I would imagine, those people would be pretty much the same people as who are now selling us gasoline, don't you guess?
Don't get me wrong, I like the Tesla, and I think they have a niche market and a place in the future. For metro dwellers and local commuters, this is an awesome thing, although I wonder what kind of range the Tesla gets in a typical LA rush hour situation? This is just not the end-all-be-all solution you wish it were.