Conversation so far:
what was the concept?
only about success, not even attempting to get acquainted with the actual persons of whom the band was comprised .
who was it comprised ?
Pink Floyd.
Are there any other interesting aspects about this article?
In the mid-1970s, as Pink Floyd gained mainstream fame, Waters began feeling increasingly alienated from their audiences.
what happened after this/?
When a band or a person becomes an idol, it can have to do with the success that that person manifests, not the quality of work he produces.
what was the biggest show?
CANNOTANSWER.
what was the biggest accomplishment?
This symbolised a new era for rock bands, as Pink Floyd "explored (...
) the hard realities of 'being where we are'".

Question: what did they do next?
Self-contained rewrite: what did Pink Floyd do next after symbolising a new era for rock bands?