This is pretty huge. The last major break thru was getting superconductivity in Y1B2C3O at liquid nitrogen temperatures (-200 C) back in the 1980s. I worked in a lab with the discoverer of this phenomena, Dr. Paul Chu.

While -70 is still damn cold, it should be achievable a lot more cheaply than having to cool things with LN2, so hopefully-- cross our fingers-- this will lead to the breakout of superconductivity into broad industrial use (and maybe the mainstream consumer market) that people have sought for decades.

BTW- while in that lab I used a variation of the meissner effect to design a memory circuit that was theoretically buildable at the time- static RAM that was superconducting. (and basically, the essentials of a transistor were there so logic gates could be built from super conductors, that was the thought experiment I was doing.)

Since heat is a major concern in CPUs, the ability to be superconducting (and thus producing no heat) would be a huge boon for computation. Of course initially this wold be at scales much larger than current lithography and thus only for specialized applications. But who knows.

With effort the cost of keeping a CPU at -70 should come down dramatically the way battery capacity per dollar has... or dare we hope the way flash density has.