According to the official press kit: "It Might Get Loud tells the personal stories, in their own words, of three generations of electric guitar virtuosos – The Edge (U2), Jimmy Page (Led Zeppelin), and Jack White (The White Stripes)."
PDGB sees it like this:
Jimmy Page: Aided in no small part by his like-minded Led Zeppelin band mates, James Patrick Page essentially created the genre of bombastic, riff-based arena-rock by regurgitating the blues through cranked-up VOX AC30's and Marshall stacks, making each lick his own along the way.
The Edge: In a quest to create an unmistakable musical voice worthy of U2's ambitious lyrics, Mr. David Howell Evans cleverly combined sparse, syncopated guitar rhythms with the latest available signal processing technology, inadvertently spawning an entire sub-genre of copycat guitarists more concerned with the effects rack than the fretboard in the process.
Jack White: Choosing to go low-brow right from the start, John Anthony Gillis created an instantly recognizable tone to call his own by combining inexpensive instruments with uniquely configured analog gear, confirming what ol' Pagey has known about white boys playing the blues all along: It's what you've got to say that matters, not the amount of words you can cram into a sentence.
Now, how about that sequel spotlighting