http://www.rollingstone.com/news/coverstory/the_madness_and_majesty_of_pink_floyd
From the page: “They owed Barrett something — in a way, everything — and if they failed to honor him that night at Live 8, before the world, they could never meaningfully attempt it again. That’s because they knew Pink Floyd would not exist past this night, and perhaps they sensed that in the much-too-near future, neither would Barrett, the man who gave the band its name and original purpose.”