Berth, what do you mean by 'contrived demos'?
The vehicles are blind, barring the coarse sensors that they carry. The cars are driving over prescribed routes that have extraordinary maps to tell the car where it thinks that it is. That makes them as good as their maps. Mountain View probably has the highest resolution maps of any place in the world, with every driveway, parking lot, gutter, mailbox, and stop sign located down to the centimeter.
Elko, Nevada? Probably not so much.
They're also backed up by Carbon Based Lifeforms to bail them out of trouble.
Vehicles may project their trip on a macro scale "drive 3 miles, left on Main, 3rd house on the left", but in the end are operated locally, with the driver adapting to local conditions continually.
The local operation is where things start breaking down. The whole identification of "stuff" problem. That's difficult in the lab, and gets worse with all of the environmental bits kicking in from sunlight to dust to wind to rain to snow. But that's the stuff that makes the vehicles "not dangerous". The reaction to the dynamic environment.
That's what made the Audi demo basically contrived. It wasn't "seeing" the road, seeing braking markers, etc. It didn't figure out it's route, it was told what and where to go. I'm assuming it's not the playback of a recording made by a skilled driver. Perhaps it had controls over speed of moving over that route, but it was effectively eating virtual dots just like Pac Man. Stick that car on a random track and say "lap it", and, well, good luck with that.
It's a magic trick. Not to say it doesn't demonstrate interesting technologies, for sure. It IS an accomplishment, but don't project beyond that. I'm sure that the cars control software lapped that track 100 times that morning on the simulator.
It's like the scene in "The Great Escape" where Donald Pleasence is trying to show that he's not blind. He plants a pin across the room. "Oh, look a pin" and walks over to pick it up. The Officer tells him to try again and sticks his leg out, and, of course, Donald's character stumbles.
https://www.youtube.com/watch?feature=player_detailpage&v=EJAjkDX0B4A#t=5060
That's basically the state of autonomous cars today.
They demo great, but they are not anywhere near ready to be released in the wild, and the problems yet to solve are very, very difficult.
Finally, as a friend mentioned, he'd feel far safer on a motorcycle around an autonomous car than not, and you can be assured that if the cars have issues with motorcycles, they won't be out on the road in the wild.