No alizio I don't think it's that far away anymore. We can call this time today definitely the beginning of the Golden Ara, with those outstanding fighters. How can the human body get much better then that?? I don't see so much more space for such an huge amount of improvment! Many of the top fighters today, already trained in a lot of different Martial Arts when they were young. Many did!
My example was Usain Bolt even in 100 or 200 years nobody will run much faster then this guy those already. It's just not possible otherwise we learn to fly sometime
MMA has still enough space for improvement thats right, but it's not that big either.
Technology will continue drive the evolution of athletics in general, be it through improved training regimens, nutrition, or PED's. It maybe difficult to believe, but there is likely some kid that will grow up, here in the next decade, to beat Bolt's record. The improvements maybe gradual, but they will exist.
As far as MMA, the athleticism will noticibly improve. Fifteen years ago, all it took to get into the cage was a little confidence, courage, and toughness. That's obviously changed, a good part due to the fact that MMA today can be a viable carreer to more than just a handful of the top guys. For example, if MMA was where it is today, 10 years ago, Brock Lesnar may have never become a professional wrestler. The sport has been around long enough, and has garnered enough popularity, that you'll see a child groomed from birth to practice MMA, just as you do in football, baseball, basketball, hockey, and boxing. I understand that combat sports require a unique blend of physiological, mental, and emotional traits, but the bigger the pool you draw from, the more talent will present itself. And with the higher level of competition, the more progress we'll see.