At what point will Blu-ray Disc be considered a mass-market success?

[4K display]

....does it need to be?

We've all heard the marketing hype and quotes from overzealous executives about the growth and development of BD.
What I would like to know is the realistic expectations of the top studio/industry people as to when they, as a whole, will feel that BD has "made it" and become worth all the effort?

As much as everyone involved would like to see it happen, I don't think BD will ever share the same overall success as dvd experienced (grand slams only come along once in a while). But how far can we go?
We can even leave dvd/competing technologies out of the equation, and look at BD on its own.
Do we need ~ 50 million players/homes reached, 10 billion$/year in revenue, 100 pc. recordable cake packs, a BD drive in every PC shipped, before we are "there"?

How do we ensure that BD remains high quality as it becomes more affordable AND profitable? Would we really want BD to be as commonplace as dvd?