katie couric... who cares?

Katie Couric plans to dump NBC, leap into CBS's arms and take over their nightly news anchor slot. Page one news! But ... why? This isn't 1966. There are lots of other news sources. Far fewer Americans watching the network evening news broadcasts, and THOSE people are on average about 85 years old judging from the commercials. Really, why is a decision on who will read the news popping up on page 1 of the Washington Post?