I found several sources for Markets ready for disruption, like education, health, insurance, etc.
But what is the best way to look for special ideas that should create a significant impact?
Some sources:
https://www.linkedin.com/pulse/20140709144459-8336796-32-markets-ready-for-disruption
https://www.quora.com/What-are-some-10B+-markets-ripe-for-disruption