I have in mind an American Government website that replaces textbooks. It would be free to access, and instead of 40-50 page chapters, it would have briefer, but more focused, readings. For example, instead of a long chapter covering all aspects of Congress, it might have a reading on the committee system, one on legislative process, one on representation, etc.
I don’t know if it will happen. In typical INTP style I’m good at producing ideas, but weak on follow-through. If I can find someone else to help me organize it and engage in the search for qualified contributors (no, I don’t want to write all of the readings myself), it could become a reality.
But most textbooks simply do not offer value commensurate with their cost. That’s a model that’s really ripe for a challenge.