Bell Labs produced a lot of interesting stuff with their monopoly profits. Apple R&D seems to come up with lots of interesting new product lines.
GOOG bought Nest and managed to become an also-ran in home automation.
GOOG other bets might produce something with Waymo, but when.. all this autonomous car stuff is continuously 5 more years, every year. That's about the closest they've come so far, no?
Not doing this has the potential for Google to miss the next technology trend, potentially crashing Google completely.
That being said, I completely agree with you on a different note. "Professional" spectator sports in schools and higher education. In my opinion, it should be completely banned. Every single such initiative distracts from a school's or university's core mission. It does not matter if each dollar they spent on it makes back ninety cents or two dollars. It is still a distraction that everyone has to do because everyone else is doing it.
I think Walter is right that spin-off is the right strategy, and (not very well known) Xerox actually did do that with a lot of PARC innovations. Just not with computers.