It doesn't matter whether you can or cannot achieve high temperature superconductivity or fuel cells, they will always be on the list because if you could achieve them they would be extremely valuable.
“I look at myself as someone who has been very lucky - my job is also what I enjoy most in the world, and I can make my life doing it.”
“First, Darwinian theory tells us how a certain amount of diversity in life forms can develop once we have various types of complex living organisms already in existence.”