In fact that means they underestimated. Read more closely, the graph is their estimate of PC Market Total Revenue and they predict only 35% market share of that pie.
So they projected a 350M slice of a 1B market, and got a 1B slice of a... ??? market
I happened to be reading a transcript of a Bill Gates interview last night. [1] Interesting that he predicted the exponential growth and realized it at Microsoft too.
So they projected a 350M slice of a 1B market, and got a 1B slice of a... ??? market