There's not even any reason to stay an xbox user anymore, the lack of backwards compatibility ruins the excuse of "I'm going to buy it because I want to play new games and also have a platform to play my old games if my 360 were to break" and Microsoft wiping your Microsoft points when they expire and switch to real money stops people from using the "I have x amount of money on the Microsoft accout I'll lose if I switch" argument. When I point this out to people they come back arguing that they'll lose all their gamerscore and that makes them sad - what's the point of having gamerscore for games that you can't play?!?
There are people who will go out and buy things without reason, research and without considering any alternatives. These people are worse than uninformed, worse than misinformed, these people are idiots.