Correct me if I'm wrong, but I think the significance of this finding is not so much about temperature, rather it's a big piece of the puzzle in understanding superconductivity. This is the first time that we are able to achieve superconductivity via mechanical property rather than molecular property. Our current superconductors are based some crazy alloys, and we have little insight of why they are superconductive.

In this finding they were able to make graphene superconductive by simply shifting two sheets of graphene by 1.1 degree angle. Graphene consists of only carbon atoms, its atomic properties are much easier to model than an alloy, so by examining why this magical angle work, it can greatly help us understand why superconductivity occur, eventually helping us design higher temperature superconductors.

Yeah, in the beginning of the article they talk about room temperature super conductors, and than this...

Yeah, that was a whole lot of lead up for that result.

“It’s so much worse than known high temperature superconductors!”