At the end of the day though it's the new mainstream releases that decides the fate of the format and so far I can't remember any major new releases that came out on DVD or streaming only (aside from Netflix/amazon productions of course, but even these seem to eventually make their way to the format). The only real problem Blu-ray has at the oment is as Mark says, major distributors sitting on a mountain of titles that they seemingly don't want to release and don't want to license out because they probably want to hold on to them for exclusives on future in-house streaming services.
All the big films come out on Blu but i think some of the lesser titles don't. I read somewhere the last couple of Woody Allen movies only got a dvd release in the uk and apparently Headshot is getting a dvd only release in the States.Which seems wacky when they release the latest Seagal dirge to the format. Germany seems to be a thriving physical media country at the moment.
I don't know about the death of physical media but i do know it's fucking impossible to get rid of stuff these days even for pennies. If it's not limited or oop then it's relist after relist on ebay. I've raised round £800 selling off part of my collection so far, it probably cost me 5 times that. Even CEX are giving next to nothing these days.