I see this this type of comment on the guitar forums I go to. I call it the Curmudgeons effect. Kids nowadays blah blah blah.
To counterpoint, how many of us had an HT or if old enough, an audiophile quality 2 channel systems when we were in our 20s? Back then we were in college and moving from apartment to apartment. It wasn't until I was older and bought my first house that I started putting together a higher end system. Yes, I do see some truth to it. My GF's kids will watch movies on their smart phone with buds in their ears. But usually it's only because they figured out how to stream movies still in the theater on their phones or we're not home and they're watching TV shows while we're dining out.
One thing I have to give Apple credit for is taking ideas and making them user friendly and accessible. Look what they did with the mp3 player and smartphone. They also have a far reaching influence. Even if they didn't invent it or even simplify a technology, they can make it cool. If Apple bought Marantz, rebranded it, massaged it to make it user friendly, made it to work seamlessly with their phones, Apple TV (if this functionality isn't just built into the AVR), and TVs, I'm sure it would be a big boon to the industry. It would raise the bar and others would have to follow suit. Not that I would expect the kids to go overboard with a high end system for reasons I previously stated.