You certainly have a valid point there. On top of that, surely streaming is cannibalizing a bit of sales.I'd hardly say that's "not so great" considering how successful Blu-ray has been, especially when you consider that streaming is a more viable competitor today than it was at Blu-ray's launch.
As a side note, i've butchered the spelling of cannibalizing so bad, my mac couldn't even figure out what i was trying to type.