wii fit was actually used for games. the only thing vitality can do is sence your heartbeat and when your using that you cant hold anything in your hand while using it. it will fail bad. also i think the reason people keep saying wii will only sell 15-18 million consoles is because first they already see it falling because its been on a roll for to long and the second reason being the ps wand and natal slowing the wii sells.
Halo MCC will sell 5+ million copies(including digital)
halo 5 will sell 10 million copies(including digital)
x1 will pass ps4 in USA, and UK.