I'm looking forward to the autonomous cars (& trucks) becoming reality soon... not because I want one, but because I get the sense a good number of drivers treat their current vehicles as if they were autonomous already!
The technology is being proven already; the laws are just catching up:
Google's Self-Driving Cars Have Never Gotten a Ticket - Alexis C. Madrigal - The Atlantic. It's not a million miles yet, but they're getting there. When these become reality, there should be benefits: better FE, fewer accidents, better traffic flow. Higher costs too, of course, but just like the current set of fancy features, this will be available on the high end vehicles and will therefore be paid for by those with $$ to spare.