IMO Waymo has the most credibility with autonomous driving. Google Fiber is, as far as I can tell, one part naïveté and one part long-term strategic plan to ke

IMO Waymo has the most credibility with autonomous driving. Google Fiber is, as far as I can tell, one part naïveté and one part long-term strategic plan to keep Google's main business running. Fiber dreamed big and it turned out that they underestimated the logistical and bureaucratic hurdles involved in all that last-mile business. But... Fiber is also a strategic asset so Google can more easily face certain types of threats posed by companies like Comcast. Just my take. I don't know about the rest. My understanding is that the strategy is to invest in a bunch of ideas with median P/E of 0, but average P/E much higher--at least, over a long enough term.