I have a pretty low bar -- I just want something which can drive on I-5 (and a few other interstates) in good weather without me actively controlling the car, s

I have a pretty low bar -- I just want something which can drive on I-5 (and a few other interstates) in good weather without me actively controlling the car, such that I could safely use a laptop or tablet. I'd still be a licensed driver and in the seat ready to take over with 3-5 seconds notice. If I can have that by 2020 in a car like the Model S AWD, I'd be quite happy. The next big jump in functionality for me would be pretty far -- a car which can operate genuinely autonomously, so I can get out and it doesn't require me to find a parking spot. I imagine doing that in an urban environment will be the last thing a self-driving car is technically or legally able to do. Something which can self-drive for 30 minutes to drive from SF to PA doesn't get me a huge amount. It'd be nice to be able to use a tablet or something instead of driving, but it would be a lot cheaper/easier to just make a halfway decent audio-only (and maybe trivial HUD and chording keyboard) computer for the car, rather than self-driving tech. that we could have done 15 years ago; self driving probably wasn't feasible until 5-10 years ago.