At first I tried to imagine how fm synth would look like in year, say, 7000 AD, when everything is intuitive, clear, simple, direct and one can easily bend reality. (and no one can actually distinguish real human from other neural guys)
FM synths would be so advanced, we can't even imagine these impossible ground-shattering sounds they'll be able to produce.
As predicted by Scriabin, music will be the key to reaity transformation. Musicians used to operate people's minds and feelings, but in these remote days, they will be able to operate the reality itself.
Quite funny though musicians still use keyboards for making music in year 7000.