If gaming was as popular in the 80's and 90's as it is now, would the GB be higher than the PS2 right now?

[S.Peelman]

Probably.

It also goes for the NES. That system had like 85% market share during it's generation, even the PS2 doesn't come near that kind of number. If by using the same size of market, a console today with 85% market share... it would have 210m units sold O.O!