As I understand it, superconductors work best at temperatures approaching absolute zero (-273.15C). For example, Google tells me that the superconductor in an MRI operates at -269C.
There has been a lot a buzz lately about room temperature (25C) superconductors being discovered, but why is room temperature the focus? Why not focus on superconductors that work in reasonably cold environments? For example, we can easily get temperatures to -15C in a freezer. Why not create superconductors that work in that temperature range rather than 25C?
It’s not an intentional jump. Most superconductors are extremely impractical for consumer use (and even just cold ones are too realistically) and materials scientists are always just chasing improvements, this one just happens to be a very dramatic one. Popular science is only a small chunk of what’s happening globally.
Again, I say all this under the hopes that the SK guys aren’t full of shit because this would actually be so cool.