Seconding John Hillestad: there is no hi-def material on this disc. It seems the blu-ray format has been used solely to get four and a half hours of video onto a single disc.
The Walter Cronkite "Man on the Moon" documentary is a 75-minute summary of the Apollo 11 flight that was apparently aired not long after the flight. It consists mostly of footage from CBS News coverage. As someone who experienced the space program largely through watching CBS, there is some nostalgia value to seeing the simple animations and simulations -- actors in spacesuits attempting to show what was happening in the spacecraft before the actual pictures from the moon started to come in. And, following Cronkite's death not long ago, it's touching to see the skilled professional get so excited during the landing and the first steps that he can't really communicate effectively. But if you're interested in the Apollo program itself, there are better alternatives. The value here is all nostalgia.
The disc also contains a number of NASA PR films: "Houston, We've Got a Problem" and "The Space Shuttle: A Remarkable Flying Machine," look dull and blurry, as if they're tenth-generation dupes of the original films. "The Eagle Has Landed" and "Time of Apollo" look considerably better.
There are two episodes of a NASA-produced series called "Twenty Five Years of Progress," which I had never seen before. It's the best thing on the disc if you're interested in the early history of NASA.
The disc is disappointing. The prominence of Walter Cronkite on the cover seems deceptive, given his participation in only a small fraction of the material on the disc. I'm somewhat consoled by the fact that I didn't have to pay the premium price asked for many blu-ray discs.