Now if roads are outfitted with instrumentation for autonomous vehicles, _and_ human drivers are prohibited on such roads, _then_ we _might_ see full autonomy. But not before.
If it were up to me, I'd focus on this instrumentation instead: RF guide wires/tags for car localization on the pavement, machine readable signage (even in fog, snow, and heavy rain -- conditions with which cameras and LIDARs cannot deal in principle), inter-car coordination mesh networks and security thereof, autonomous vehicle readable road work signage, police gear to direct traffic of autonomous vehicles, and so on and so forth. There. Hundred billion dollars worth of startups in one paragraph.
As things stand, you can only be fully autonomous at 25mph in California where it never rains, as long as there's no fog, no road work, and no one has messed up the markings on the pavement.