What is the diffrence between electrionic art, and random junk that happens to fall together?

So, electronic art, what is it? I come to this with some very heavily shaped opinions of art. I grew up in and around massive amounts of "modern art" some of which only could be seen as art because someone had declared it. I am talking about art pieces that were in fact pieces of structural steel, combine together in the shapes that could only be described as reminiscent of beach defences at Normandy.
I developed my dividing line of the difference from art and a mess while looking at the pieces that my brother performed in in college. My brother was a student at Dartmouth and was the star or a performer in numerous pieces in his time in college. I remember looking at some of the pieces that he was in that made it to the Ivy league film festival, they were weird but they were art.
I define my taste in art based on movies. So to make my tastes clear i will list some of my favorite movies. Leon, the professional(french cut), Blade runner(anyone else note the similarity in the ad of the female runner and the female android), Fifth element, Fight club, Lord of war, Pitch Black, Black Hawk Down, just to name a few.
So for me art is in the development of emotion in the individual who sees it, if a piece does not steer and control your emotion it is not art.
http://multimedia.american.edu/courses/gned220_sp08/