What I don't understand about these acquisitions is how tangential it is to Dropbox's original value prop of being a "dumb" folder that would magically sync all of your files and stay out of your way. Now, instead of Dropbox passively running in the background and letting me do my thing, they want me to start actively engaging with the software.
I agree that it's necessary and overall a smart move, but still a very large and difficult pivot to make.
If that's really the play, Hackpad isn't the right acquisition. The real value is in the sheets/excel space, and the knowledge of collaborative document editing doesn't naturally translate to spreadsheets (the general nature of edits are not linear)
EtherCalc was, is, and will remain a F/OSS infrastructure project, not a business enterprise.
But even Search wasn't enough for Google; it's not wrong
for companies to expand their offerings.
Google has made billions consistently from it's advertising operation. Their shift to other areas have always driven to expand search.
In the case of Dropbox, they need to go head-to-head with the Drive/Docs/Apps provision coming from Google. They're not as well-positioned to do that as they could be, and I'm not sure hackpad will be close to sufficient to get them there. But it's certainly a step in the right direction; documents are moving off the hard drive entirely, and there's no reason Dropbox can't help with the move to the cloud by expanding their offerings with moves exactly like this one.