Thinking about it for a while, I think not much will change for us. We as unix users will probably try to have a system that is as familiar as possible, because we know it, we are powerusers of that system and so on. And I don't feel like it's likely that the bigger corporations will adopt the unix way (not for usual computer users, that said) so we will have to make workarounds for services that are taken granted on other systems.

Linux is moving towards (systemd|freedesktop|redhat) style software, increasing the complexity and decreasing the (I can't find the word right now, the fact that the system is divided into different parts that are working together in accord), having more monoliths. Wayland will only work with some X layer installed as well, for at least the next 10 years. X dying off is not something we can hope for in the near future.

Linux will not explode in usage, but will grow steadily as it has the last two and a half decades. There will be no 'Year of the Linux desktop', maybe there will be a 'Decade of the Linux desktop' where the usage will rise a little bit faster than before and after.