Yeah you're right. Things which may not happen are
1) A lot of songs John wrote for Yoko wouldn't be on the White Album
2) No Hey Jude ( NO! NO! NO!)
3) No Imagine by John (I think John will be able to write this, he was Getting Better)
But on the plus side
1) More George. John would definitely allow George to have more songs after Something
2) More creative albums like Sgt Pepper & Revolver oh and Abbey Road too
3) And in the end more..........The Beatles..........More ...