i don't honestly think it's fair to compare this technology to autotune, although both make modifications to vocalizations, the Disney technology literally allows the device to be trained on an individual's voice and then to let any other individual sound *exactly* like that first individual on the fly. no pre-recordings, no splicings, just absolute free-form talking.
that said, I believe there is a bit of a disconnect with the technology. it has a little bit of a cold feeling to it. especially if you look at the Disney Parks video and Mickey talks about how he can hardly wait, it just sounds odd. Could be the way the line was actually said, but there was just something unnatural about it.
Also, I believe the Mickey you hear is Bret Iwan, not Walt Disney, not Wayne Allwine. Bret's voice has already been demonstrated in the latest Feld entertainment shows and a couple of other places, I've also heard him on the All Star Dance Mickey. It's pretty darn close.
And yes, this puts a whole lot of voice actors' jobs at risk. Although the patent had the intent to preserve the integrity of someone's lifelong work (for example, Jimmy Macdonald could be 'providing' Mickey's voice today or Jim Henson could still be 'voicing' Kermit the Frog or Mel Blanc could be 'doing' Bugs Bunny), it has some diabolical, unintentional purposes as well. Imagine being able to use Owen Wilson's voice in the Cars TOONs. I imagine there's some legal issues that will arise as well, but it won't be too far of a stretch when you can just pay off Tom Hanks one time to train the device for a lot of money and then hire actors to use that same voice for countless films, promos and attractions.
So that's why I think there may be some hesitation to use a technology they've had for quite some time, independent of the costumes. I'm wondering if it was used at all for the Mobile Muppet Labs and wonder why it's not used for Turtle Talk, Stitch Encounter or the new Jack Sparrow experience on the Disney Dream.