It’s dense, and author Charles Stross presents enough throwaway ideas for at least a dozen other novels.
Accelerando follows the adventures of three generations as they experience the world just before the technological singularity, during it, and just after.
(The technological singularity is the point where an artificial intelligence begins to create a runaway chain reaction of improving itself, with each iteration becoming more intelligent. Eventually, it is vastly superior to any human intelligence. Is that something to worry about? Maybe. Stephen Hawking once said, “The development of full artificial intelligence could spell the end of the human race.”)
The book is deeply technical in spots, which is fun, but still has good characters you root for (or despise).
Recommendation: Get it at the library. I really liked it, but its vision of a future that requires implants soon after (or before) birth just to keep up with the world freaked me out a bit. I don’t want to be reminded of my impending future shock every day.