The remote idea is harder to copy, putting a speaker is easy to copy.
As far as I know it went like this:
Miyamoto said that the controller had a secret (which now it seems it was secrets, nunchaku acelerometers and speaker)
Iwata said in GDC that the console (as in the whole thing, not just the controller) wasnt fully revealed and that "the big secret" will be revealed at E3. My guess, something to do with online, so I dont care about it.