I am all for the spread of chip music. I love it so much and share it with everyone I'm around. I'm glad it's getting bigger, and I've never been disappointed with it's growth. When you say "mainstream" it scares me, though. Not because I am against everything mainstream, but because, in my general experience, when something starts to try to meet the needs of the whole of society, my needs are almost always neglected.
That said, chip music doesn't only affect American society. So, if it were to go mainstream, there would still be fun sub-cultures of chip musicians and engineers doing what they love to do. Most people who make things, regardless of if it's music, software, or hardware, do it because they love this scene and not for profit. I don't really feel that this particular group of people can be marketed and controlled. So I guess I'm not too worried over all.