interesting comments and reading, thank you, - I would like to put up a couple of opinions as answers to the comments made by Eva and Guenter, although should state that I have not seen the film, - but happy to class myself as a fan of Jimmy Page and more importantly in this debate of The Edge and Jack White.
Simple answer as to why The Edge and Jack White were included; commercial reality. All 3 of these guys appeal to different people, - all 3 approach their music in a different way and I would imagine will draw in an audience, - being realistic I am sure that there will be a few kids who go to see this film because of each or both of those 2 and are bored by the old boy with the grey hair!
To me it is great thing when musical genres mix, - appreciation of music is about being open minded and ALWAYS taking the positive out of what you are hearing, - and perhaps disappointing when you hear or read music fans picking others apart when perhaps they don't get it? I posted up a thread in this section after I saw U2 last month and as I said in that thread music is about emotion, - I have different emotions ergo different music plays on different emotion.
U2, - probably the biggest band in the World today, - I appreciate that size is not everything but it certainly gives credibility to (in my mind) The Edge as a fascinating individual who has reached and stayed at the pinnacle of the music industry for some years. As Bono (singer U2) says, The Edge is not "Rock 'n' Roll" as he is a bit of a techno geek, - but does that make him any worse than any other guitar player? Not in my book. The song that you mention Eva with the 2 notes is "Elevation" and The Edge himself is openly stating and showing the World that it is this simple, - but to understand the song (its lyrics are almost nursery rhyme like) it perhaps need to be understood that this is a stadium song. U2 play to enormous audiences IRO 90,000 and in those venues complexity is lost as was proven my Kings of Leon trying to play in the O2 Arena earlier this year. U2 absolutely have stadium rock nailed, - to see their show is to be taken on a musical journey of highs and lows, - I have never seen anything like it. The other and perhaps most important factor with The Edge's songs is the room needed for Bono, - so invariably he keeps his part simple as does Adam Clayton and Larry Mullins Jnr and the melody of the song appears.
This is a great video http://www.youtube.com/watch?v=GkgvIPpdboA of The Edge talking about a lovely song "With or Without You" and I think he is essentially again saying how simple can be absolutely mind blowing and when you are part of a 88,000 crowd absorbing that it sends a shiver down your spine. This is my video of that moment:
http://www.youtube.com/watch?v=qFi28AAFXSE
They are big enough as a band to give the song to the audience, and very few can do that as well as they do. A lot of bands/musicians will go into some long complex self-congratulatory solo and absolutely there is a place for that and we can all shout and scream our appreciation but perhaps it is the bigger man who stands back and lets the audience be part of the song? The Edge is that man.
Jack White.... Certainly an appeal to the younger audience, - he is a bit of an Emo, he is an experimenter, and his shows are a bit theatrical.- He has written one of the best riffs of the last 10 years with "Seven Nation Army" http://www.youtube.com/watch?v=VutMLnjXTY4 recognised as such as being in Top 10's in NME and Q magazine polls, - and good enough for inclusion in The Simpsons.... It is a blinding tune that engages people, - and more importantly is accessible: My 10 year old sat there with his guitar and worked out the riff and gets a real buzz from playing it...Simple can be good, very good.
I guess I am lucky to appreciate all 3 of these guys, - as does my son so we can't wait to see it, and get the DVD , and the Tee shirt....
If you ever get the chance to see U2 go for it, - it is an amazing experience and for me it is when a lot of their songs come together.
Ian 
footnote after typing the above I read Eva's reply below but I have not the patience to go back and edit now, - I think you have it lady. -
We need the Blues fans (I am a music fan) on this site to open your eyes and ears and let in other sounds and artists, - how we can we expect U2 fans to appreciate JB if we don't try and appreciate their taste!
Get onto the U2 sites and tell them about the World that is Joe Bonamassa...We know that they will be pleasantly surprised.
My YouTube channel with plenty of my Joe's videos dating from 2009 inc his first Hammersmith Odeon ones:
http://www.youtube.com/ian916fun