I just bought a black, horizontal form factor Wii. According to this Wikipedia article, this model was just released, and is called Family Edition. According to this FAQ at Nintendo, the only functional difference between this model and the previous (vertical standing) one is the GameCube backward compatibility, and as a result, some Wii games/accessories are not compatible.
Are there more functional differences, other than the GameCube compatibility I should be aware of? If I don't have legacy games, should I be concerned by this limitation (i.e., how much does the Wii ecosystem rely on that GameCube support in general)?