Asynchronous logic design tools. Imagine a world free of the hack that is the clock signal. Current processors are all designed at this local optimum, since it would take years to build the tools necessary for processor designers to make self timed logic.
So, you're asking: if making money for yourself to pay the bills was not a problem, would you prefer to work on a vaporware company that could get you rich like Twitter or on something serious that could change the world?
You can do these things even if you have to pay bills. Just start small with sth you can ship quite fast (a part of a robot or a small one, a robot for a niche market). You can grow your company and eventually you will be shipping robots like it's 1999. A lot of companies start like this, the problem is that we look at apple etc as examples while most companies start with a small part (or as distributors of a product).
I love learning and teaching. So I would either start a school (ilke a trade school) where anyone can come and learn 'real world" employable skills. It couod possibly be online.
I would also do an open source learning management system (some ppl are already doing this of course)
If nothing else, I will become a tutor/teacher at things that I am good at. I will volunteer at schools/universities.
