Male and female will change to one another. Uh...
I personally think we may not have to wait that long.
The ball has already started down that humongous mountain.
I don’t think we have to worry about that.
Males and females who simply believe that they can ‘change into one another’ by ‘identifying’, lopping bits off, taking hormones, etc. - they are the ones who are just fantasizing.
But the idea that we may further evolve genetically over hundreds of thousands or millions of years is interesting speculation.