There are always challenges that can make our tricks get better. As we learn about the mechanics of physiology, in the sport I know best, gymnastics, I can see tweaking requirements to spare some of the weaker parts of the body in order to get even more spectacular achievements while minimizing injury.
If I were gymnastics queen I’d focus less on sticking landings on floor, of have sticking mats that were even more padded or,something, to spare the feet and ankles. So that the passes could increase in difficulty without needing the risk of injury increasing. Use the limits of the body and do new things with it, use technology to help.
Football too - Americans love our football but no one wants their son brain damaged at 25. Or 40. Can technology help with these things? Can small game rule changes help? I believe there will always be ways to excite us with new athletic achievements.
The new records will be set by the freaks of nature.