I think the key thing to watch is what they will replace Qualcomm's firmware with; if at all. Apple made a move a few years ago to reduce their dependence on Qualcomm. From what I've heard, Apple is rolling out their internal replacement for their 5G modem from year or so.
Basically Android is OSS linux with a lot of proprietary drivers that are not under the control of Google. And a lot of those are provided by Qualcomm. What they provide is effectively an OS inside an OS. Linux is a somewhat hostile environment for proprietary drivers and it necessitates some technical steps to insulate against the 'viral' nature of the GPL.
Google likes their dependency on Qualcomm just about as much as Apple does. It would not surprise me if they eventually move to their own in house 5G stack and I bet that would be a proprietary fuchsia exclusive. Proprietary ensures you get your software from Google (or Qualcomm). And making it exclusive to Fuchsia ensures they have full control over the combined package.
Chinese manufacturers are also insulating against being dependent on Qualcomm. E.g. Huawei has their own 5G modem and is of course also in the base station market.
Anroid could be barely named Linux. More appopriate Google/Android or Google/Linux - in relationship to GNU/Linux. Google seems to do everything to push out GNU and the GPL. Especially the compatibility layer "PlayServices". Aside from userland the closed-source modules in the kernel are a plague. I prefer a strong BSD and Linux community over everything just controlled by a single company. Therefore:
We shall be worried. My feeling and past experience tells me "Don't use it. Don't support it. Or we will suffer."
I bet that most of drivers will be proprietary. It seems the main motivation for Fuchsia: to allow windows-like model for drivers with stable driver API, because Linux-like model does not work well for hardware manufacturers.
