[mainsail that]

Is this gonna make them internet tubes faster or just speed the speed up the router to PC transmission?

[Klutz Dohanger]

The short answer is neither, at least for a number of years.
The demo is transmitting 50GB/s of data over a short distance of 50 meters, and is unsuitable for long haul transmission, ie, the internet tubes.
Your PC is still limited by bus speeds, and cannot handle data being delivered at these speeds.
However this is good news for data centers and server farms that routinely experience bottle necks in replicating massive amounts of data among dozens of computers.