The gigs have attracted prog rock fans from all over the world.

BBC: Veteran British rockers attract the cruise ship crowds

Prog rock and arena rock were not good weapons to be holding in this war because they were nothing more than different forms of the pretentiousness that was disco.

FORBES: 35 Years Of Night Fever

The quartet Alt-J, whose "An Awesome Wave" won last year's Mercury Prize as Britain's best album, did much with little on stage as odd two-part vocal harmonies, a gently picked electric guitar, lush synth lines and syncopated percussion coalesced into a distinctive blend that united folk, prog rock, electronica, show tunes and hip-hop.

WSJ: The State of Things | Coachella Valley Music & Arts Festival | Jim Fusilli