People that know Pink Floyd from the beginning know what innovators they were. When the Weattles were being poser hippies, Floyd had 2 years of Pyschidellic Music under their belt. Syde Barrett was a lyrical Genius. And Pink Floyd were the first to use alot of mixing and sound effects that set the tone for many many musicians to follow. Say what you will but future bands owe alot to Pink Floyd.
Pete Townshend skipped a Who gig in 67 just to go see Floyd play.