Tough to say. 4th to 5th Generation was huge. CDs were becoming the standard (even if Nintendo refused to join) and 3D worlds were possible for the first time. I know there were some 3D games before the 5th gen, but they were very primitive. And let's not forget the DualShock controller. Built-in rumble, two analog sticks, and most of the buttons we see today in a controller.
And 5th to 6th was pretty huge too. DVDs were becoming a thing, built in internet was as well. Open-world games (regardless of genre) were virtually impossible before the sixth generation. But we got some heavy hitters in the 6th gen. And even Xbox supported HD in some games with an adapter.
We'll have to wait and see with the 9th Generation. The specs are very impressive, as well as integrated SSDs.
Lifetime Sales Predictions
Switch: 161 million (was 73 million, then 96 million, then 113 million, then 125 million, then 144 million, then 151 million, then 156 million)
PS5: 122 million (was 105 million, then 115 million) Xbox Series X/S: 38 million (was 60 million, then 67 million, then 57 million. then 48 million. then 40 million)
Switch 2: 120 million (was 116 million)
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima
