Minna no Theater will allow Japanese Wii owners to stream television shows, anime, and movies on their Wii consoles. The downside is that the software alone will cost 500 Wii Points to download and then an additional cost for each program.
We'll have any further information on this unique service if there is ever any word of a release in the US or European regions. Although it's not likely to happen, with Nintendo and the Wii you just never know.
Source: Nintendo Wii Fanboy