That looks brilliant, I guess it's just a set of pre-recorded that the character can pick and choose depending on the photo op they want to provide. It looks like it's test only atm, but if they can fix this to work consistently then I can see them being very popular in the parks!
I guess the only problem would be that if you had an interactive Mickey, you couldn't have a non-interactive one elsewhere, otherwise kids who've met the talking Mickey would be confused as to why the other isn't?