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).
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Kevin Yee is the author of numerous independent Disney books, including the popular Walt Disney World Earbook series and Walt Disney World Hidden History.