To stretch the analogy in a different direction, Altairs and the like were never going to grow into anything that people would recognize as a computer today. They were important from an evolutionary standpoint because they inspired and helped educate a generation of technology developers and advocates, but they were also dead ends.
On the other hand, if you pull the covers off of any desktop PC chassis today, almost every major component will be recognizable to anyone who ever owned a piece of Woz's handiwork. The IBM PC engineers weren't inspired by Altairs or Simons, but by the Apple II. (Which, itself, was the product of the last fight anyone ever won against Steve Jobs. Woz gets credit for that if nothing else.)