Reading what scant details I'm seeing about Quicktime X, I'm hoping for some reassurance Modul8 will function with it.
It sounds like, reading phrases like "QuickTime X would be a ground-up rewrite", and "based on Core Audio", that it will be fundamentally different.
Since Modul8 seems so highly dependant on Quicktime, the question of Modul8's future with Quicktime X is a rather obvious one.