Since it's all speculation.
I'd say that those in the know and need to support older hardware will go React OS (they might want to start to advertise a bit more I think)
For gamers, wine is/is getting pretty good and with Steam giving a hand behind that will probably give a good push forward it, so it'll be up to other users to switch to <your favorite Linux distro>
The remaining will probably continue with renting windows, or switching frying pan and go Mac.