Does it really matter? I mean you can’t be faster than light, wich is around 300km/ms which we pretty much are. I see this more as a bandwidth type of improvement. In theory we could do 65ms around half the globe with a diffct fiber connection and about 900 trillion watts of energy but thats not really the use case I think.
A better improvement would be WiFi and 5g stability and latency. I loose more latency over WiFi than over my entire connection to any server I need.
Wish we had that in Germany. As great as the autobahn is, when it rains it reflects so much that you don’t see the Markings anymore without highbeams.
But maybe that’s a northern thing.