During the years Tim created the web, John Warnock invented Acrobat and for a long time he had no idea on how to sell it. Adobe was spending 50 millions each year to promote the new technology, but at the end two killer apps made the PDF fly. In the US the IRS decided to accept PDFs and in Europe we convinced several software manufacturers to replace their printed manuals with PDfs on CDs. That made the trick.
When I look at the Solid technology, I feel that everything will depend on finding the killer app. At the moment the main focus seems to be on adding as many cool features as possible - waiting for the developers to create something great.
Several - less technical members of this group should focus on brainstorming to find the possible killer app.
What are the areas, which could profit from user controlled access and data repositories?
personal health, smart home, personal media, personal finance, car data, smartphone gps, genealogy, knowledge taxonomies, personal search history, …