The most amazing thing about this to me is that both of my kids (8 and 12) will probably know all about this by the end of the week. They and a lot of their friends are absolutely glued to everything Notch and Mojang says. I've seen my 8 year old playing Minecraft while watching Minecraft videos on his Kindle Fire. My son had to make a cake for scouts - we made a Creeper. Both kids went to a soap-making event - they made creeper soap. Our 12-year old's FIRST robotics team went to the state championship - all the kids cared about was whether they could get on the hotel WiFi to play Minecraft.
Notch is creating a whole generation of raving fans, far beyond anything Atari or Commodore did for my generation.