What's your definition? They certainly do a lot of driving related things pretty well and others quite poorly (much like humans but we have different failure modes).
If you life in San Francisco, CA, you'll often see Cruise cars roaming the streets at night collecting data with no physical driver present.
Really? Because autopilot works pretty well for me already. I have it on way more than I have it off. Long roads with lots of stop lights, and 6 hour drives no longer bother me.