A simple test for the hardcore players.
Count how many are in your family. Count how many are NOT hardcore players. Divide the first number into the second one. This % is the number that the Wii can get to.
Alright, a bit facious about that. But still, so many non-Wii fanboys believe it is all antedotal evidence of casuals picking up a Wii Sports and having fun with it. Or at best, a fad. IMO, a fad is something that becomes popular, but only does one thing. Therefore, it gets boring. Hula hoops, talking Elmos, etc. were fun for a while, but then the fun wore off. The difference that I see with the Wii, is as long as there are games that come out, as entertaining as WiiSports AND as simple to use, the fun from the Wii will always be fresh for at least the generation (ie about 4 more years).
Torturing the numbers. Hear them scream.
