To quote "Extreme Tech"
"we would argue that the Xbox One’s increased size isn’t to reduce the chance of thermal failure — rather, it’s a sign that Microsoft’s engineering team simply wasn’t good enough to design a console that was small, light, and had good thermals."
Easy answer really.
Bet with Adamblaziken:
I bet that on launch the Nintendo Switch will have no built in in-game voice chat. He bets that it will. The winner gets six months of avatar control over the other user.