Let's be clear about one thing. Most if not all of the chapters in this book have appeared in various places before. Richard Feynman has been dead 20 years, and nothing here is newly discovered material. However, it does provide an insight into a gifted mind, who was also eloquent with the written word.
One chapter has been famous in computing for decades. "There's Plenty of Room at the Bottom" was a talk he gave in the early 60s. Where he speculated that circuits could be reduced in size by orders of magnitude, with concomitant effects on performance. A foreshadowing of Gordon Moore's observation several years later, that became Moore's Law.
Another related chapter has Feynman's predictions about future computers. Future, that is, from when he made his remarks. Read it and see how accurate he was.