Yes we care. I can buy uncompressed catalog CDs which already provide me with a backup from Amazon for less than what it would cost to download.
BD playback on a laptop of course make sense when you have a 1920x1200 screen. If apple still has lame displays on the 15" that has nothing to do with it.
You care. 'Consumers' by the million dont care. Apple build machines to suit them, not you.
Apple sells a single laptop that could display BR without downsampling it. Not to mention that anyone watching BR on it will have a hard time getting far enough away for a proper viewing distance. And it has only stereo speakers. And it is only a 17" display.
BR on a laptop is a pointless piece of geek credibility that other manufacturers support to have another spec to add to their list of bullet points. Apple doesnt do that.