I have zero interest in a self driving car where the operator is expected to "remain vigilant". Driving can become boring as it is. Just imagine if you have to sit there, but not actually drive the vehicle.
When the vehicles are fully autonomous and I can nap, read, shave, whatever, then sign me up. I could see something being developed with dedicated thoroughfares in areas with high volumes of long distance driving. The automated vehicle (and only automated vehicles) would be allowed on these thoroughfares until the rider chose to take an exit.
IMO, like virtual reality, back in the 90s, this technology will take far longer to roll out than people expect.
