It's really hard to define underserved. Deep learning now has a lot of potential, but it's not being used to solve a lot of things.<p>YC's RFS is a good place to look: <a href="https://www.ycombinator.com/rfs/" rel="nofollow">https://www.ycombinator.com/rfs/</a><p>Government and health care can be difficult to penetrate too, and there would be a lot of potential for people who have the connections.
IMO: Food. Just think how many thousands of dollars the average person spends on food per year and how very little of that is tapped by technology. There's Uber Eats and other food delivery services popping up, but there's still a lot of money to be made in the industry.
Aviation, Private Aviation.<p>Most systems are legacy and haven't moved forward because of so much regulation. Once you've moved past that user adoption is hard because most of the industry hasn't seen tech before so it's manual work.