I would like to see more research into superconducting applied to computing, vs. the "quantum computing" applied to computing. I feel that while superconductibility is actual and proven technology that just waits to be applied to a new field (computing), QC is a "dream about the future".
OTOH I think there are theoretical lower bounds on the amount of energy that needs to be ejected as heat from a non-reversible computation, such that a non-reversible SC would still need to produce some heat.