As for whether it's still that popular, I'm not so sure about that. It'd say its popularity peaked towards the end of the show up to a couple of years after, but I don't see it referred back to all that much now compared to The Sopranos or even Deadwood. Someone like Omar doesn't seem like as much of an iconic pop culture figure anymore. Not entirely sure why.
I don't think anyone cares about the album anymore but the song "Beautiful Day" is still one of those ever present pop tracks that still shows up a fair bit. I'd even go so far as to say that's somewhat deserved.
With superhero movies I naively predicted they were heading for a decline around the start of this decade. "Pshaw, rebooting Spiderman again and scraping the bottom of the barrel now with b-list shit like Thor and Captain America! People aren't going to fall for that". Oh well, can't win em all.