I don't see it. Unless Dropbox comes out this something pretty big, they're dead in the water (meaning they are in a maintaining mode). I think it was possibly not the best idea to go for a 9-digit sales. I mean, when you start a company, you do it for pretty much 1 reason, to make money. To turn down that much just because you're "dedicated" to your company?? I call bull on that. They're hoping to make more money later on, but problem is, every software service company is coming up w/ their own cloud based storage.
I'm droping Dropbox here as soon as I get everything transferred over to me Box.net account. 50GB free for lifetime when you install their iOS client. How can dropbox compete with that? Box + SugarSync offer way more features too. Everyone is going to pass up dropbox here soon. MS, Apple, Amazon, Google, etc... That leaves no buyer for dropbox, and with their record of "keeping up" (w/ Box and SugarSync) or lack there of, leads me to my thoughts that they should have recognize the future, and they will be competing will full fledged software companies, that make billions in any given quarter.
I will give them this. They were I'd say first major consumer friendly mover in this space that made it dead simple. But as a mentor of mine said, Pioneers were killed by the Indians. Being first isn't always best, especially when you're not equipped(have the resources) to handle the long haul, which I complete agree with SJ on Dropbox is a feature, not a product, and the sooner they come to grips with that, the better off they'll be (unless they have something big in the pipeline that would change all that).