I've been playing around with Dropbox Paper since it's Beta launch. Today the product is officially launched and it positions itself as a collaboration tool, very much similar to what Microsoft Word on Office 365 or Google with G Suite are doing.
Here is the video.
Well, not judging on the market proposition, my first reaction using the product and after seing this video has been: That's a great blogging tool!
I don't think this will ever happen, but Dropox should seriously think about that, and open it to be a blogging platform as well. As a CMS has all the features needed and the easy of use is quite good.