Using "Old Man's War" and "The Matrix" as a vibe guide (intimate stories with some brain bending twists), here's some I haven't seen mentioned here, yet:
- "The Long Earth" by Terry Pratchett and Stephen Baxter
- "The Peace War" by Vernor Vinge
- "A Deepness in the Sky" by Vernor Vinge
- "Walkaway" by Corey Doctorow
- "Paycheck" and "The Minority Report" by Philip K Dick - Both also got decent movies and much of Philip K Dick's work fits this vibe, actually.
- "The Door Into Summer" by Robert Heinlein