Streaming can only be convenient if you have the internet connection for it, which many people don't. It doesn't matter what your tech savvy friends are doing, it matters what the general public is doing, and when it comes to HD content they are buying Blu-ray discs more than they are buying HD movie downloads. That is really the only stat that matters, and is unlikely to swing towards streaming /downloading for a number of years yet.
Also, I would argue that convenience over quality works more for rentals than for purchases. Netflix streaming etc is like having an all-you-can-eat buffet, where you know the food will be low-quality but you just fancy pigging out a bit regardless of how good the food is. But when you want some fine dining (to purchase a movie you really love) Blu-ray is still going to be the choice for many years to come.
Again, I think we all know that physical media is on its way out the door eventually - but Apple are living in the same cloud-cuckko-land (pun intended) as everyone else who thinks Blu-ray is already dead. It has many years of life left in it, and it's a farce that a mac bought today lacks BD movie support, when that machine will almost certainly be obsolete long before Blu-ray is.
