Ironic how new information comes to light (smoking can kill you) and then it's perfectly clear with the benefit of hindsight.
Football, boxing, and certain other things that involve practitioners knocking each other out will become the domain of a uh, subset of the population...
IF someone is still playing football in 20 years, don't be surprised to see teams importing raw athletes from the third world as cannon fodder. One way to beat the salary cap, one would suppose.
Somehow, somewhere, Jimmy the Greek is smiling.