This is fairly old news. The only new thing is that actual long-distance test results were presented at the OFC conference in a paper (officially breaking the record). Here is an actual article on the topic instead of a fucking stupid tweet with no actual information:
https://www.techradar.com/pro/internet-speeds-3-5-million-times-faster-than-us-average-possible-with-current-fiber-optic-cable-tech-how-does-1-020-000-gbps-sound
And here is an article talking about this type of cable being created about two years ago:
https://spectrum.ieee.org/multicore-fiber
It's a fiber optic cable that uses 19 cores. The impressive part is that it uses standard cladding, so you could plug it into existing systems and use existing manufacturing infrastructure. However, it would be really difficult to splice a cable like that, so you probably still wouldn't see these used much outside places where the cable can be placed undisturbed for extremely long periods of time (underground, etc.). It's a good sign for the future.
