Google seems to be putting a lot of resources into their new Fuchsia OS, which though open source, is still completely managed by Google. It also has the drawback of not being under copyleft licenses like GPL, which means other companies can just take it and make proprietary forks.
People who have followed the Fuchsia project, do you see it eventually becoming a significant enough competitor to Linux to be a threat to it, and therefore giving Google even more control of the software world?
Likely in the mobile space, it will at least replace Linux on Google Pixels, and I would bet the Samsung line of phones. It might also replace Linux in Chromebooks. I don’t really see it going any further than that.