TWRoO on 23 December 2008
You must be some kind of joke account if you don't think Wii Sports is a system seller. It is arguably the biggest system seller of all time, never mind of this generation alone (only SMB on NES comes close).... people ARE buying the Wii for Wii Sports... that means it is a system seller.
And regardless of what you think, people are clearly enjoying Wii Sports else they would not play it so much.... The average playtime per person for Wii Sports is higher than for Mario Galaxy, in fact only 3 games are played more per person (that is included on the Nintendo channel, which includes all the important games at least) Twilight Princess, Smash Bros and Fire Emblem.
Personally I have racked up 110 hours of Wii Sports.
