It's an add-on that makes the Wii APIs marginally easier to program for. Contrary to the marketing, it doesn't actually make things more accurate; it just gives developers less of an excuse to be lazy.
Unfortunately, it's being marketed as making 1:1 motion -one of the worst gaming interfaces ever devised, however neat it seems on paper- possible. This will be the biggest draw up until people actually get a chance to use the interface, at which point most will throw down the remote in disgust.
Complexity is not depth. Machismo is not maturity. Obsession is not dedication. Tedium is not challenge. Support gaming: support the Wii.
Be the ultimate ninja! Play Billy Vs. SNAKEMAN today! Poisson Village welcomes new players.
There is much to hate about modern gaming. That is why I support the Wii.