And while I could see that as a neat trick (I think Elon was going more for the comparison to the High Speed Rail boondoggle) it would be much more interesting if it could do something like Reno/SF or maybe Boise/SF so that folks could live in a nice place and work in a trendy place. But the whole notion of 'tasked' cities (living cities vs working cities) is still not well developed.
This is, perhaps, the most obvious Jetsons-suburb style future we can attain. It's so alluring and outlandish. I tend to work in plants, but I end up commuting just to stay away from the soul crushing industry. (Or soul-crushing industry, depending...) To be able to live in a nice garden village and then take a 40 minute ride out of state to my plant would be an utter joy.