Upscale hot dogs?

A new place called Bison Jack's opened here in the Madison area not too long ago, and based on the website it's not a typical hot dog joint as the sausages are made from bison meat and the buns are baked fresh on-site.  There aren't any other listed locations so it might not be a chain.
 
Are places like this catching on elsewhere?  Obviously Biker Jim is already involved but I'm curious about whether or not it's a current trend in other cities.
 
Brad