What the world needs is an easy to use web publisher, the Microsoft Word for the Web. Sure, we can type text and publish that. We can't however add in math formula's, pictures, excel sheet (parts), word document links, slideshows anything digital really, with "unexpected simplicity and ease". There's always pain involved, and I know individuals and companies are willing to pay heavily if these problems are solved in an online publishing tool.
The community is now just there to generate critical mass for adoption, and used as highly critical feedback userbase.