I said something similar about A New Kind of Science, and that was ridiculously underwhelming. I respect Wolfram like crazy, but I want my money back on that thing :)
The thesis of A New Kind of Science is something like "systems comprised of a small number of simple rules can perform arbitrarily complex computations."
The book proceeds to support the thesis. The content is comprised of descriptions of such systems, corresponding Mathematica execution trace diagrams, and analysis. These analyses are related to a ambitiously large scope of natural phenomenon and scientific knowledge.