Where Google goes, I expect the rest of the tech companies (including companies that just fancy themselves as tech companies) to follow. This is that moment when everyone is reminded of "at will" employment.
Tech companies won't move in lockstep on this. Battle for talent is too intense, not many companies can call shots like this like Google can. Some companies will be glad to differentiate to try and attract Googlers that do not want to return to the office, that do not want to be vaccinated (tho I think the number of tech workers that are not vax'd is small)
Nice