Blu-ray version vs. 24bit CD . . .

[franklinpross]

This might be naive, but last Jan I bought the Sweeney Todd CD on Nonesuch. It sounds pretty good. (I'd say 24 bit resolution)
When the BD came out I got that too.
My HT is fairly decent. God knows ,the neighbors let me know all the time
just HOW decent. No matter what I do to cook up the BD it just doesn't
have the detail of the CD. All things being equal (?) do you think the BD
just has 16bit sound . . . and that's it? . . . . . . .

Will there come a day when all BD will be MPEG-4 or VC-1 AND 24 bit res?