If one watches Harry Potter and the Order of the Phoenix, the last 20 minutes of the flick is to be in 3D. I was wondering how would that work? Are the audiences required to wear provided 3-D glasses? Or is it a "simulated" 3-D effect without the special glasses? I might see the movie in IMAX 3D if it is available near a theatre where I live, but I will see it regardless if there is IMAX or not. So is it worth seeing in 3D? :)