I own Blu-ray discs myself but it's not a friendly computing format. If someone has a disc with 1080p disc running high bitrate video and lossless sound it's overkill for a computer where the avg monitor size is less than 24"
Well... I have to disagree on screen size / resolution. Even with a more heavily compressed downloadable trailer, the difference between a DVD resolution file and a 1080p one is clear. Go try it if you like. I'm sure most people are sat much nearer to a computer display than a TV, so the resolution makes a bigger difference.
You could argue lots of things are overkill. Multi-core multi-Ghz CPUs are overkill if you're just editing text. Multi-Mbps broadband is overkill for just sending a simple text e-mail. It doesn't mean they're not still worth having though, just as having that high bit-rate video and lossless audio onteh disc is worth having when it's being utilised. It's better to downgrade 1080p to whatever your screen res is than blow it up from DVD or worse, isn't it?
Where I'd agree is that it's unfriendly in terms of all the stupid licensing and DRM etc that has given Apple an excuse to not support it yet. I'm not sure managed copy makes it much more 'friendly', it sounds like a ridiculously overcomplicated way for not much benefit. I just wish they'd all (Blu-ray Acssociation, the studios, Microsoft, Apple...) stop treating their customers like criminals who have to be 'managed' at all.