When I go from the SF bay area down to LA, I get gas at kettleman city (because of the in-n-out :) and I go to the chevron station there. From google street view, it looks like that station can fuel 12 cars at a time. And when I'm there, there's often a line for a pump.
A gas stop takes, say, 2 minutes. A tesla charging stop takes 30 minutes. So serving the same peak flow of cars would take 15 times as many car spots: 180. Land looks cheap in that part of the central valley, so it might be feasible to have that much space. But 180 chargers, peak, each using 100 kilowatts would use 18 megawatts.
Great scott! That's a lot of power. So it looks like this is still in the range of luxury-car, low-volume stuff. I can't imagine what it would look like as a mass-market thing.