Those are theoretical numbers for a small elite. Real world numbers for most of the planet are orders of magnitude worse.
edit: I am 80 miles from EWR not 200
More relevantly... who wants to architect a web app to have tight latency requirements like this, when you could simply not do that? GeForce Now does it because there's no other way. As a web developer you have options.
From Philadelphia suburbs to my actual Fly app in:
EWR 8.5ms (NYC)
SJC 75ms (California)
CDG 86ms (France, cross atlantic)
GRU 126.2 (Brazil)
HKG 225.3 (Hong Kong)