Sure, running has health benefits, but those same benefits can be gained by using a machine and not destroying your muscular-skeletal system. Not to say that a short jog is going to tear you to pieces, but it is not the Fountain of Youth that it was portrayed as in the 1980s.
So you believe that there will be no great leaps in technology for the next 500,000 years? Because you've said before that you are not talking about 500 or 5000 years, but more like 500,000 years.
As an employee at Intel, I know that computer technology advances so that the processing power doubles about every year and a half, which allows other technologies to near double in that same amount of time.
And, it has already been shown that direct brain to computer can be done in mice and rats in dozens of different kinds of experiments. I do beleive there already exist prototype human brain to computer devices for the handicapped.
So unless your finger evolution happens fast, direct brain control of technology will happen much, much, much, much sooner.
Sure there is... Many people from sub-saharan Africa have skin that is so dark brown as to be actually considered black.