I think one of the reasons that hack worked well for them was from farther distances they couldn't see you. But right around a corner they could. I think there are some people using something similar still.
It's not as simple as 'far distances'. This relies on map drawing i believe.
And if people are able of getting away with those hacks what is sense of demo-based checking?
As far as i know opengl replacement cheat would be detected by XY anticheat measurement. This is capable of getting most similar hackers. But there are always ways to prevent detection...
Anyway my point is: this can still only show obvious cheats. Moreover, there will be always someone who will consider demo of sth a proof of cheating, blablabla (not to confuse with blaa). I don't really believe this will change anything.
(Nevermind my fake nickname).