I would love nothing more than for Bay Area congestion to be solved by self-driving cars, but I take this announcement with a grain of salt because it lacks any mention of liabilities and regulatory hurdles. Unless the management can answer the difficult questions, unforeseen difficulties likely await anyone who installs this device in their car. Insurance companies may refuse to cover accidents caused by the device, and automakers may even void the warranty if there is any demonstrable link between self-driving and increased engine wear & tear.
I am fairly confident that self-driving will proliferate a feature offered by the automaker at the time of purchase, just as adaptive cruise control and lane assist is becoming commonplace right now. It may be difficult to convince an average consumer to rig up a device in their car that isn't supported by their automaker.