You are right
1-old gen still sold well before next gen was announced
2-old gen still expensive so a price cut would boost old gen more longer
3-Third party released a lot of cross-gen games
PS4 - over 100 millions let's say 120m
Xbox One - 70m
Wii U - 25m
Vita - 15m if it will not get Final Fantasy Kingdoms Heart and Monster Hunter 20m otherwise
3DS - 80m







