I think the Astros have shown that a mix of young players and veterans makes a healthy combo. The Astros are not where they are without McCann, Beltran, and especially Verlander. I think the Astros getting Verlander demonstrated how much of a difference one player can make, especially if he is a top-notch starting pitcher. Who are owners most likely to throw crazy money at? Top-notch starting pitchers. Secondly, the tear down model is a painful one. Not every owner is willing to go that route.
There are a lot of teams that have good, young talent. If anything, I think the Astros title will encourage owners to go after "that one guy".