Except that it doesn't. Not in any way that's meaningful to sports fans across the Country that is.
To Houston? You bet it matters. If you want to know why think about that picture above. On the one hand, you have Dallas. Cool, confident with a brawny National reputation that doesn't worry too much about what everyone else thinks. On the other hand you have Houston. Yappy, sometimes annoying, and way too concerned about being taken seriously by the big boys. Oh the travesty of the Texans not being given prime-time games (despite the fact that they sucked, and their brand of football was borderline unwatchable at times) during the early years of the franchise while Dallas hogged the airwaves. Dallas has gone 10 years without a playoff win...blah....blah....blah.
The hard facts are the Cowboys are still the premier team in Texas except for within the Houston Metro area. Even then there are people who grew up rooting for other teams who might follow the Texans (heck, we might even pull for them) but they're never going to replace the Cowboys (or, in my case, the 49ers) as team number one.
This is a PRE-season game. The only thing that matters is that the One's & Two's look good. Whoever winds up at the top of the scoreboard at the end of the game is inconsequential....unless you're trying to get the attention of the fans of the Big Dog that is*, then it might seem to you to be the most important thing in the world.
Perspective Texans fans. Perspective.
*Yeah, yeah I know...in the cartoon world Chester the Terrier eventually "bested" Spike and proved him to be a coward. But that's a child's game, in which we try to teach our kids that life doesn't suck and the good guys always win. In the REAL world, Spike beats the crap out of Chester 10 times and Sunday. The Texans want respect? Start winning some games.