Developers don't have to use the Wii functions, but it is definitely true that most/all of them will be trying to implement the features in their games. Once the 'oh, that's cool!' gimmick dies down, hopefully we'll be able to see some more in-depth stuff.

DQ Swords was looking like one of those lame plug-in TV games, but the more I see of it the more interesting it becomes. For me it's gone from a 'write-off' to me keeping my eye on it.