I dont know, I read someplace that a new wii is comming out that can play dvds and its going to include someone elses software to play the movies and its gonna cost more than normal wii just because they have to liscense the dvd software. So looks like thats gonna happen. If I find it Ill post the link to it.
But Wii already has dvd drive thats what all the games are on. They just dont let you play movies. If you use a mod chip you can use the wii to play movies now using gamecube emulation and linux thats what I read. You couldnt do that if there was no dvd drive.