Room-temperature superconductivity looks like it might be a step closer to becoming a reality. I need to steal some ideas, what technology would you put in a cyberpunk world that makes use of zero-resistance electronics without the need for massive cooling? Super-fast computers? Super-powerful magnets? Maglev? Railguns?
Back to the future style hooverboard, it fits both in the punk aspect of cyberpunk and has that retrofuturist vibe. A nice video on the topic using high temperature superconductor (high temperature in the sense works in liquid nitrogen)
On the Dystopian side, room temperature supra-conductivity will reduce the price of MRI or even allow open ones, what about a building which use an MRI scanner at entrance like airport have metal detector nowadays
You could do cool stuff with maglev train, better electric engine or cheaper particle accelerators but it lack that the cyberpunk vibe.