This is odd, I'm sure that there are solid examples of a perfectly good product or service failing because it was too ahead-of-its time, but I'm drawing a blank at the moment. Ugh.

Anyway, the point I was getting at is that timing does matter, and that DropBox was, in addition to being well-executed, was also well-timed. And that given enough time, eventually, someone else would have come along and executed well once the market was ready for it.