$100 - wipes out college kids, grad students etc., which is probably the sweet spot of festival attendees.
Emphasis on past-their prime artists makes it difficult to create real buzz and will appeal most to an older crowd that doesn't want to go to a festival and spend the day outside w/ 40-60,000 other folks (unless Radiohead is there).
Jewish Holiday.
Roger Waters at Nissan completely overlaps with the demographic that can afford a ticket and give a crap about the Who.
Also, festivals are a summer thing, aren't they? Like a "best day of the summer" event. This wouild make more sense if it occured Labor Day weekend.
It has the makings of a super fun day though. Besides the headliners, bands like STS9 and Theivery and Flaming Lips and New Pornographers etc. should create a great vibe . . . then throw in the big names and it has to be sweet. But . . . the lineup is more sweet than marketable.