How many startups have a long term plan to take over the world from the very beginning? If you interviewed Bill Gates back when Micro-Soft was making BASIC interpreters, would you get the slightest sense of what Microsoft is today? Or Steve Jobs when Apple was selling the Apple II? How about Larry and Sergey when Google was just a search engine? I think they would seem a little more concerned with where their business was at the time and a little oblivious of what it would grow into.
I would be shocked if any of those you mentioned would say "There doesn't necessarily have to be anything more after this" when asked what was next for their company. All mentioned were probably concerned with the current projects at their company during the early times, but all were also probably looking towards expanding their company as well. Oh, and I'd be shocked if any of them would be interviewed with a red 'frat' cup in their hand or with their co-founders doing keg stands as well.
I'll admit, it's hard to imagine any of those guys drinking beer from a keg, out of a red cup. I'm not sure that Zuckerberg's lack of media training and fondness for cheap beer at the time was a bad thing. In 2005 a fair chunk of Facebook's users were doing keg stands and drinking beer out of red cups.
Apple, in its early days, was Woz thinking "hey, I can build a cheap computer" and Jobs thinking "hey, I can sell people Woz's computer". I don't know what he would have said if you asked him what was next. I'm sure the Mac wasn't on his mind, and neither was becoming the most valuable company in the world by selling cell phones.
