Nice!
For the sake of pointing out the obvious... one would assume that if you bought WiiPlay, you do in fact own a Wii and had the controller that came with it.
If you got a gray market Wii and somehow you did not own a controller, then yes, WiiPlay's bonus pack would come in quite handy.
Predictions For Last Full Week of Sales in 2010)
WII - 80.35 Million
360 - 43.88 Million
PS3 - 41.40 Million
More terrible predictions coming Jan. 2011!!!