Talking about teens they generally do not care/know about quality. Yes, they fill their mouth with 120/240fps gaming, OLED, 4K/8K and then if you ask them most don't even know what those terms mean. Most importantly they have no clue how badly compressed can be an YouTube video or, even worse, their favorite tv show they, nearly all, stream illegally. Actually, nearly all have no idea what "compressed" means..
That has been confirmed last night even by "Gossip Girl" I am watching in Netflix (I know, I know.. But it is light, funny, and there are some of the best looking amazing babes. So... shut it!

). In the last episode I watched there was Blair, the "queen of upper east side", fashion fanatic, watching a movie... from a laptop!! And not even a Mac. It had the - URGH! - Windows logo (but that has been a very misplaced Windows ad seen the context!

). And so did his "friend" (no logo, though). I felt disgusted in any possible way! With all the money she has as minimum she should have had a 100" plasma TV on the wall (it's around 2010), connected to a DD AVR (although I realise wires around the room are not very.. fashionable).
Personally, being older and thus wiser, I watch Netflix from my phone only when I really don't know how to pass my time (like when waiting 1 hour to see the doctor). As I like to have my backup copies stored in my NAS, which I can access from anywhere in world as well if I need to. But with Internet speeds growing everyday (and the EU is pushing the fiber connection everywhere, although it will miss the 2020 target), and the attitude of the new generations explained above, it's reasonable to predict that backup copies and NAS will soon be obsolete.
If I remember correctly even the digital sales of mp3 are falling, people is moving to streaming (Spotify and the likes). And the most VOD apps allow to make a local copy anyway, as a backup when we know we have no access to the internet. But the idea is that they are just temporary, to be removed when space is needed..