What you're talking about has been happening both ways, and Dallas-based establishments also 'invade' other cities such as Austin. This is just what happens when a restaurant becomes sucessful, they expand, and sometimes to other cities. We've been getting restaurants from various cities across the country, and have exported our own restaurants to other cities as well. This has been happening forever, and I don't really see the issue with it, especially since it sounds like we're talking about a handful of restaurants coming from Austin.
If this creates a more competitive market, then so be it. People are moving here in droves, so I'd imagine that there is more than enough business to go around. If other restaurants end up failing as a result, then that's just the nature of things. I know it's unfortunate, but we shouldn't deny new businesses setting up shop here to try and protect our own. That just seems absurd and a recipe for failure.
I see this as a win because a well-known team from out of town has decided that this part of Dallas is deseriable enough to invest their money into. It's a great sign for this particular area.
Also, Asian BBQ from a pair of white chefs? Eye roll over here. Very Austin.
I'm not sure why this would be considered an 'Austin' thing. Asian-fusion restaurants are popping up all over the country in every cities' trendy areas. I don't find anything unique about what Austin is doing in their city, so I always get confused when people say something is 'very Austin'.