Considering that you can still buy a brand new VHS deck (it'll have a DVD player built in as well, but it counts), I wouldn't worry about Blu-Ray going away any time soon. The idea of an all digital future is seductive, but the truth of the matter is, we don't have the internet infrastructure to support that. Not at 1080P, and certainly not at 4K as someone suggested above. Even 720P would be too much if suddenly everyone who wanted to watch a movie downloaded it from the internet. This is, of course, ignoring the strain that would be put on it by all videogames and music being distributed over the internet, not to mention just daily traffic -- checking Facebook and so on. I'd say we're a minimum of 10 or 20 years away from the internet even being capable of that sort of future, and another five to ten minimum after that for the content providers to move far enough in that direction for physical media to be in trouble. Blu-Ray may have been superceded by a new physical format by then, but considering the way optical formats work, as long as it's still an optical disc, it'll probably be backwards compatible with Blu-Ray, DVD, and CD. If not, just like VHS, you'll be able to find combo players for as long as enough people have collections lying around to make it worth selling[footnote]Read: Until the current crop of 20 somethings is old and/or dead[/footnote].