I don't know how much of an effect this will actually have. It will be interesting, though. The SV mob was strong enough to affect Mozilla, but a service as huge as Dropbox might be mostly immune from the mob cries. They have lots of equity outside of the HN crowd and Rice is taking a board seat, not an executive position.
It won't have an immediate effect. But once the network effect takes hold these things pick up steam fast. Bitcoin spent 3 years in obscurity before it took off.
Also if you think about it are choices of browsers are actually quite limited. You have Chrome, Firefox, IE, Opera, and Safari. Our choices in cloud storage provides are unlimited. Even my ISP provides the service now.
Popcorn status: Ready