“The future is already here. It's just not evenly distributed yet” (Gibson, but not sure)
For a tribe in the Amazon forest, Shanghai or Tokyo could be from a scifi movie set 500 years in their future. For a villager in a small-sized town in Belgium perhaps only 5 or 10yrs in the future.
So transhumanism is not something that will be : it always was and currently is. It just a word for a mindset that embraces these changes and want them to happen faster and sooner.