I was less surprised than you seem to have been Michael. I've been expecting the news since his family made it known the Cronkite's health was in decline a few weeks ago.
It does seem somehow fitting that he passed away over the 40th anniversary of the Apollo 11 mission. It is a bit of a shame that he was still with us for the date of the launch, but not for the landing and first steps, though.
For those of us of a certain age, Cronkite was almost as much a part of the space program as the astronauts themselves. He was certainly the astronaut's favorite newsman. (There's a scene in Apollo 13 where the astronauts are gathered at Jim Lovell's house to watch Armstrong's first steps on the moon, Someone asks which network to tune in and the shouts of "Walter!" easily drown out the tiny minority plumping for Jules Bergman of ABC. Of course, Cronkite's voice and image opens the film, via archived footage from that night.
RIP Walter Cronkite,
Joe