I am trying to find out a little more about this but I am guessing this means that more people will see the game nationally. Interesting. I will update this post with any more that I find.
[Update: The Houston Chronicle explains the switch well: "The league said the change was made to "accommodate regional broadcast patterns," which is a fancy way of saying that Texans-Chiefs was scheduled at noon opposite the St. Louis-Carolina and Dallas-Philadelphia games on Fox. Moving the Texans-Chiefs game creates, in effect, statewide doubleheaders for the Missouri and Texas teams on Fox at noon and CBS at 3:25 p.m."]
The Chiefs are currently 4-0. They are favored over the Titans this weekend and should be favored over the Raiders in Week 6. IF the Chiefs can win those games -- /knocks on wood -- they would be 6-0 heading into the showdown with Houston. That game would seemingly have Wild Card implications down the road.