With all due respect, if YC wants to focus on something outside your standard fair I'd suggest you look at the problem of manufacturing. The NY Times article that is the subject of another HN post is right on the money as far as the issues surrounding manufacturing --of just about anything-- outside of China.
If you want to give back to the country, principles and culture that quite literally gave you everything you are today I'd suggest putting money and brain-power to work on this very problem. Develop new advanced automated manufacturing technologies that the world has yet to even imagine. Develop new work-flows, materials and processes. Develop new supply chain paradigms and environmentally-friendly systems. Develop tech that will bring back millions upon millions of jobs lost to, effectively, slave labor.
Make Artificial Intelligence and Robotics the next big thing. This is the future.
Hollywood, is doing a good job of destructing itself. And, in the grand scheme of things, they are just about insignificant.