List of albums that will still be popular 50 years from now...

Indian classical music too.

Inna,

Nearly 20 years ago, I stopped listening almost every popular title listed here (simply got bored and please DSOM, LZ and RS listeners don't get offended, but it's true) and listen to mostly what's strange, weird, unusual and sophisticated plus indeed classical music. I get far more joy from Michael Rabin than from Michael Jackson for sure!

I'm seller of music for VERY long period of time (since my early teens) and as once Scarface told, I "don't get high out of my own supply" and usually what I sell I can only listen for grading purposes. 

So you are on your way too.
But I will never stop listening to Bitches Brew and Pangaea by Miles and to some McLaughlin's music. Or Camaron's flamenco singing. And I hope all this will still be listened to, at least by some, in 500000 years.
We live forever.

1 Perl Jam album. Which doesn't matter because they all sound the same.

Well, lets go back at least 50 years ago:

https://www.youtube.com/watch?v=lnOLgcH5oWw&list=RDlnOLgcH5oWw#t=27

The first album ... actually it wasn't an album, it was a single record at 78 rpm. that's all we had. Fifty cents each  It came out in 1954. This is what we listened to when I was in Jr. High ... and that was before the invasion from England when the White musicians stole the traditional Black Rhythm and Blues music and replaced the tenor sax with the guitar and renamed it "Rock." 

This music will still live 50 years from today. 

Frank