What? How long was I out?

Jennifer pointed me toward this article: "Sleeping Beauty awakes on Blu-ray." You knew it was only a matter of time before movie-watching became more interactive... though honestly, my guess as to a debut would not have been Sleeping Beauty.

...Although if you were asleep for 100 years or whatever, you probably shouldn't be all that surprised that your movies suddenly know what the weather is like outside: "The sky behind the castle will reflect the weather in [the viewer's] hometown, whether it's a blizzard in Cleveland or a balmy day in San Diego."

Does this add value to a movie? It's a gimmick, and while I'm all for gimmicks, I hope this kind of thing spurs really useful technology. The features this article mentions are new but not entirely compelling to me... why do I need to be able to send "movie mail" or chat during the credits?