I am tempted to ask if this thread is a parody, but that would be rude.
None the less, I shall answer the question in the negatory.
Skyward Sword will not be multi-platform. Why? Well, the control scheme, of course. Not because the N6's interface will be radically different, but because it will not be different enough.
Think about it; Twilight Princess was appealing as a Wii title because of the Wii motion controls - Nintendo sold it as the first 'core' title incorporating the new control system, making it 'superior' to the GC version - but it was a true 'last gen' game from a technological standpoint. In other words, the port of Twilight Princess willfully established the fact that the Wii was not a giant leap forward in terms of tech and/or processing power, but because it offered new experiences, this was not considered a problem.
The N6, so far as we know, does not rely on the same kind of 'revolutionary' changes to either the interface or the presentation. What, then, does Skyward Sword gain by a port/concurrent release? Nothing. And what of the N6? The last thing Nintendo wants is for their new system to be thought of as interchangeable with the Wii, which was already considered outdated when it was released.
So, no, it won't happen. There's just no reason for it.
