I very sure that she would disagree with my attempt at summarizing her ideas, nevertheless, I think her key insight is that technology is corroding democracy because:

1. Technology companies are subsuming services traditionally supplied by the state.

2. Technology promises enhanced democracy (Twitter as a town square, or the Mac as a fight against Big Brother) but ends up degrading it instead (wealthy/powerful voices drown out others in a global arena).

3. Tech entrepreneurs are inspired by the grand society-changing concepts of sci-fi, but are either picking the wrong (harmful) parts or misunderstanding the true consequences.

As I said, I don't agree with her on this, mostly because it's a very subjective perspective. She has a certain view of an ideal society and criticizes deviations from that.

I find it fascinating because it raises good points. She paints a vivid picture of the modern world--I just think it is incomplete.