It was 44 years ago that...


Parlaphone released the Beatles 'Sgt. Pepper's Lonely Hearts Club Band'.
What other albums can be considered having as much impact, actually altering the direction of a music genre?
montejay
Maybe not to the extent of Sgt.Pepper's but:

Elton John-Goodbye Yellow Brick Road...proved you could sell millions of copies of a double album.

Peter Frampton-Frampton Comes Alive...proved you could sell millions of copies of a "live" album.
Moody Blues "Days of Future Past" first concept album?
Also right about the same time as Sargent Pepper's