I’ve been advocating against those “extra features” such as PiP and BD-Live. Better for us if the studios make the main movie better video and audio quality, use all the space in the disc for the main movie.
But it looks like they (the studio) also need a way to promote blu-ray to the people by adding more features that DVD can’t.
So far I don’t like the PiP since it’s annoying if you watch it during main movie playback.
Anyway I will follow the progress and if friends, children, grandma, uncle and auntie like it, I may change my mind.