can blu-ray movies do this?



and if so, why don't they?

Not at this point, but the future proof format does plan on doing it in the future.

That's what BD-live will be, from what I can gather. I saw a clip of two people playing a trivia game, online, on a mock up of an Xmen BD.

Not at this point, but the future proof format does plan on doing it in the future.

Not at this point, but IN the FUTURE THE format does plan on doing it in the future.

Saying "future proof format" is insinuating that current players are future proof. They are not.

As of now, no player can take advantage, save maybe the PS3.

It's accounted for in BD-Live Profile 2.0 for Blu-ray, but no players are planned to support it yet (though the PS3 is probably a shoe-in to do so whenever Profile 2.0 goes into effect).