After looking at landing page, it's completely unclear what it is. Powerpoint with comments? Pinterest for enterprise? Google Wave with Material design? "Create, review, organize" — but even Quake level editor is about creating, reviewing and organizing.
It's Google docs but instead of being aimed at producing documents for prints, it is aimed at producing document for online consumption (multimedia) These documents can be used for notes about ideas, documentation, business plans, etc., etc. Kinda like webpages, but with an easy-to-write interface, collaborative chat, and easy user access management. Honestly, I thought the landing page showed that quite well. It did…
Honestly, not a bad idea when you think about it. It seems strange that we're still use word processors/pdfs in an increasingly post-paper world. The web, I think, solves a different problem, and in any case not everybody should have to be a web designer to be able to produce a good document for designed for computer-first consumption.