If this happens it will be awesome, but might kill the efforts of similar open source projects like postmarketOS, ubuntu touch, etc. Maybe that's what Google is aiming in the first place. Anyways it's good to have some challenge by Google, this will give the extra motivation to the community to reach there first.
Fuchsia Google said recently it is not going to continue to develop and it was more a rtos than Linux. This would help alot of people that are already doing this in the Android hacking community.