Was the NES the closest thing to a monopoly as a system can get?

[Falcon095]

Gearbox said:
Well the nes had the biggest dominance but the ps3 has sold 140 mill (vg chartz is off by 20 mil) the nes never reached 70 mil.

 

 Holy Crap! When did the PS3 sell 125m? I must have missed something very big!