In order for innovation to happen, a bunch of things that aren't happening on closed platforms need to occur. Valve wouldn't exist today without the PC, or Epic, or Zynga, or Google. They all wouldn't have existed without the openness of the platform. There's a strong tempation to close the platform, because they look at what they can accomplish when they limit the competitors' access to the platform, and they say 'That's really exciting.'
Gabe NewellWhen I worked at Microsoft, I got to go and visit a bunch of different companies. Probably a hundred different companies a year. You'd see all the different ways they'd work. The guys who did Ventura Publisher one day, and then United Airlines the next. You'd see the 12 guys in Texas doing Doom, and then you'd go see Aetna life insurance.
Gabe Newell