It's in the same style as Pattern Recognition (indeed, it shares some characters), and again deals with possible alternative uses of existing technology. It seems to me that Gibson's writing is getting more subtle each book, and this one is almost sparse. There aren't many wasted words.
It follows three different characters, all tied into a mystery, and they get chapters in turn. I've read some other books in this style recently, and this one shows how it should be done. Gibson's chapters are short and punchy, so you never have to think about what was happening to a character last time you were with them. A positive contrast to multi-character stories that seem to use this as a way to essentially fit multiple novels into one book.