It's a bit more than that. For instance, it's not just a basic head, it's speciliazed to the character. The Donald Design is Different from Mickey, for example. Here's a list of where I think the new Heads could be put to good use:
Disney Dreams Come True Parade-Mickey, Pinnochio (all other talking characters are face)
MK opening- Mickey
Epcot Tree Lighting Treat-Mickey, Minnie, Goofy, Donald (Seasonal)
Beauty and the Beast-Beast, lumiere, cogsworth, mrs. potts, chip. (or they could always just make them face characters, I hear some of the New York Costumes may be available soon :lol

Fantasmic-Mickey, except in 1st scene (fingers loaded with pryo, and he doens't speak), Steamboat (no speaking), and Sorcerer (on the top during finale, he doesn't speak). Radcliffe should become face in order to match.
Festival of the Lion King-Timon
Mickey's Jammin' Jungle Parade-Mickey, Minnie, Goofy, Donald, Rafiki (could be face.)
Opening-Mickey, Minnie, Goofy, Pluto
That's all I can think of for now. An for those of you wondering why Hook and Smee are suddenly face, It was a required to happen, as they would have been the only 2 mask characters without lip movement in the show, that would look bad.