It depends on the type of idea. FB and Uber are not eureka-type of ideas: they are timely innovations resting on top of existing similar products/services but p

It depends on the type of idea. FB and Uber are not eureka-type of ideas: they are timely innovations resting on top of existing similar products/services but probably better due to technology, timing, business model, etc. I'd say that for such ideas skill is not required but rather the ability to spot innovation opportunities. Then there's the eureka-type idea like the blockchain or 5D storage disks. I'd say that for these ideas you need to have a strong knowledge on a given field in order to be able to come up with such breakthrough.