IT cannot create an art by itself.

I read an article about a startup called Riff Station yesterday.
[http://techcrunch.com/2014/07/18/riffstation-play-makes-it-easy-to-play-along-with-youtube-music-videos/]
Riff Station analyses YouTube Videos and shows guitar chords for you.

I think this app is useful somehow.
But, I believe that music cannot be shown in a bunch of computer programs. This is because it's Art.
Guitarists always think about the chords and the chord degrees.
But the most important thing is tone and touch, and how they express their feelings.

So, if you really want to learn how to play a guitar, you should listen to the guitarist's tone, touch, and know their feelings.
I do believe that IT helps to make some issues become easier to solve, but IT cannot create the art itself.