I'll answer that with another piece of prognostication: good highway self-driving will cause massive disruption to the airline industry.
Would you rather do this for a business trip to a 400-500 mile away city:
- fixed time to depart (and fixed for leaving your destination!)
- have to book ticket weeks in advance for a reasonable flight
- no flexiblity if plans change
- pack a small bag
- transit to an airport (parking or cab or whatever)
- arrive a sufficient amount of time in advance
- check in
- go through security
- get on plane, stuck in seat, no/crappy food
- get off plane, go to car rental place
- rent car (not yours, sucks)
- cost: 100-200$, and if you want to bring anyone it's a multiple of that.
- no cell phone, restricted to plane wifi if they have it
- door-to-door is what, 4 hours? Man I hope there isn't a delay....
Or, with self-driving:
- pack your car or minivan to the brim with stuff you need
- leave when you want
- sleep / stop to eat / stop to bathroom when you need it
- full cell coverage / hotspot
- take additional people
- EV cost is like... 20-40$ for the trip if you include wear and tear?
- door to door is... 5-6 hours
If the car is driving for you, it is far less stressful, flexible, much cheaper, especially if you want to take your family.
Trains are a ... bit ... better than airplanes, but still inflexible, surprisingly expensive, won't have your car at the other end, have to haul around your luggage rather than chuck it into YOUR CAR.
When good highway self-driving comes, I will probably never fly anything less than 1000 miles. If I get a self-driving RV that's EV self-recharging at charge stations? Hell I might get rid of my apartment.