First of all, the option should, and I think would be, for all macs. I think I'm right in saying that all current macs are perfectly capable hardware-wise, it's OS X support that is the obstacle.
If I'm away from home and I want to watch a Blu-ray on my portable mac, I can't. I'd like that option.
If my partner is watching something else on the big HD TV and I want the option of watching a Blu-ray disc on my mac I can't. I'd like that option.
I don't like that Windows has such a clear unarguable advantage over OS X, especially for such a consumer-level issue that anyone (read: potential switchers) can understand. 'Windows plays Blu-ray movies, OS X doesn't.' Compatibility of files and availability of applications has always been a rallying point of Windows Vs Mac, so I think Apple is scoring a ridiculous own-goal by their continued stubborn attitude on this issue.
If you're not interested in Blu-ray in your mac, fine, don't have it. Apple sold 'combo' DVD-ROM/CD±RW drives for years even when DVD±RW 'super drives' became dirt cheap, if you didn't need DVD burning you didn't have to pay for them. I'd like to stress this point: Apple could actually make easy money on BD drives as an option and use those profits to invest back into whatever people who don't care about Blu-ray would rather see in macs, things they regard as more important. Everyone can be a winner here.
It's beyond embarrassing that macs don't play Blu-ray movies at this point, for Apple, for Steve Jobs, and I'd argue, for advocates of OS X.
Steve Jobs, (member of the board of Blu-ray releasing Disney and CEO of Apple, a paid-up Blu-ray association board member): should I really have to install Windows (by Microsoft, who supported the rival HD-DVD format that lost the format war!) on the computers you sell to be able to play a disc with MPEG-4 based content on it? Really? To me, a "bag of hurt" is a bag full of Blu-ray discs that I still can't play on a mac. We pay you to overcome your bags of hurt for us. Please do so!