I just finished the book and really enjoyed it - but I disagree with
@Werthead's assertion that the book delivers little original.
The geek culture and 80's references were something I'd already heard of and was expecting to like - but in the end, the computer references were to consoles and games that came out
before the home computer revolution of the ZX82 and Commodore 64 that most of us would be familiar with. In fact, the ZX82 doesn't even get a mention, and the Commodore 64 only gets two brief ones - Atari 2400 text-adventures and a few early arcade machines seem to be the main source of the references.
Additionally, the 80's references were mainly to US TV shows and 60's & 70's Japanese animes I didn't get at all. The big geek references -
LOTR, Star Wars, and
Star Trek - were in there, but more in the background.
Bladerunner was the only big references to get much time on the pages.
But, what was really interesting was the setting - not the real-world one, which I struggled to buy into. Energy crisis in 2044? We'll have electric cars as the norm long before then. Environmental catastrophe? That's going to take centuries for the effects to properly roll in.
Where I thought Cline really excelled was in his imagining a future immersive world, and the corporate exploiting of it. Oh, sure, we've imagined virtual worlds before - Tad William's
Otherland comes to mind. The difference here was that Cline filled his pages with little details which made it all the more realistic, not just in how such a virtual reality would operate, but also on the real-world effects on the users (ie, self-imposed solitary confinement and disdain for the "real world"). I think too many people might have missed these, distracted by the geek triva and fast-paced plotting.
My one big surprise reading this was that an obvious plot twist never happened. I thought Og would turn out to be the evil genius behind everything - the markers were all there for it to happen - but in the end I was thankful that Cline didn't pull such an predictable plot point.
Overall, a blistering read, very entertaining, and spookily prescient IMO - all the hallmarks of a good science fiction novel.