I think Richie Benaud (peace be upon him) would have said...
You gave me a shock then! You make it sound like he's dead! (He is alive and well at 83 )
I had to check as well.
I'm not so sure about Benaud being the successor to Arlott. Arlott was a marvellous raconteur: I recall when he and Jim Laker were the commentators for the Sunday League, which was about 5 hours' live television on a Sunday afternoon, they were rained off one particular Sunday at Trent Bridge. Arlott took a cameraman on a tour of the Long Room and simply walked form portrait to portrait, giving a 5-minute talk about each portrait's subject. It was absolutely wonderful, gripping television and I bet no-one ever thought to record it. Having said that, I think there was sometimes a certain amount of embellishment to some of Arlott's stories.
Benaud, on the other hand, is a hard facts-and-figures technician first and foremost. A great commentator, not given to unnecessary flannel. If you were watching a test match and no-one spoke for several seconds, you knew it was Ritchie Benaud's turn with the microphone.