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.
“The theory of evolution is totally inadequate to explain the origin and manifestation of the inorganic world.”
“Your position never gives you the right to command. It only imposes on you the duty of so living your life that others can receive your orders without being humiliated.”