Finally got hold of the High Frontier supplement for the GURPS Transhuman Space RPG. This is still one of the best "realistic" imaginings of a near-future solar system - probably circa 2150 or even 2200 given current rates. It's certainly on a par with Paul McAuley's Quiet War series.
One thing that also struck me about recent SF I've read:
- Cyberabad Days by Ian McDonland is all about future India
- Quiet War is about a dominant Brazil in space
- Transhuman Space is all about a dominant China in space.
In other words it looks like the BRICs countries will inherit and dominate our SF future.