Sega would still have no reason to drag Dreamcast out more, or at the very least not make another console.
Rare goes multiplatform, as I'm skeptical of Sony buying them.
PlayStation Network is the torchbearer for console online multiplayer and functionality. No way is Nintendo going to do it instead of Xbox Live.
Sony is even more arrogant developing the PS3, as there is no Xbox 360 to compete with it.
Nintendo doesn't change much, at least not off the top of my head. GameCube will do better, but I'm pretty sure Xbox stole more PS2 sales than GameCube sales.
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: 115 million (was 105 million) Xbox Series S/X: 48 million (was 60 million, then 67 million, then 57 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