It's no great leap of logic to assume the mirror may melt away into a one-way mirror or even a screen. After all, it's extremely uncommon to add props for no reason to a really old attraction - especially when you're adding just one. And spending money to wire it for power.
Disney hasn't ANNOUNCED anything here whatsoever. Nor have I heard any rumors about a Sorcerers of the Magic Kingdom style game in DHS. But this one prop is certainly suggestive, isn't it?
That said, it's probably more likely that this is a refresh simply because they had to change the queue anyway. The movie shows Kodak prominently as sponsor, and since that ended, Disney will want to change the preshow movie. I guess they might as well add new interactive props when they do it?
Speaking of power, there's a lot of cables here. More than you'd need for just the dresser lights, I think.
I've turned these pics sideways so you can read what's on the "trunk" below it and the mirror "trunk" itself. It's the new Muppet Walter from the movie! (would you believe I never made the connection to Walter Disney before? I'm really dense sometimes).
Kevin Yee is the author of numerous independent Disney books, including the popular Walt Disney World Earbook series and Walt Disney World Hidden History.