As we've seen, it's possible to have moderate success (ex. Nashville, Tampa), but it's just as or even more likely that the the whole thing crashes and burns ala Phoenix and Florida.
I think a lot of us here are missing the main point of a Vegas team and why it really can't be compared to most any other market so far.
This will be a unique opportunity for the NHL to completely own a decent sized city in the US. The Las Vegas area has two million residents, and while a good portion of us come from other places, we're here now. Phoenix is twice as big with four times as many options for spending your professional sports money. Nashville is a little smaller, with an NFL team in addition to the Preds.
It's overly simplistic, but if we assume every person in every US NHL city has $100/year to spend on attending pro sports and they split it evenly between all the options even without taking into account number of games, avg attendance per game, etc., Las Vegas is by far a better option than any of the moderate success cities just based on lack of other pro sports options. I think this is a good way to demonstrate why Vegas is a good option. Heck, if you start factoring in cost of living, average wages, and disposable income, it looks even better.
Phoenix: 4.3 million people. x $100. 430,000,000
/Four Pro Teams 107,500,000 per team
Atlanta: 6.1 million x $100. 610,000,000
/4 152,500,000 per team
Tampa: 4.3 million x $100 430,000,000
/3 143,000,000 per team
Miami: 5.5 million x 100. 550,000,000
/4 137,000,000 per team
Las Vegas: 2.0 million
/1 200,000,000 per team.
The only one that's close is Columbus (1.9 metro population/1 team), and they fill a 104,000 stadium seven times a year for Ohio State.
This whole (again overly simplistic view) hinges on the NBA not coming along with the NHL, but I sincerely doubt basketball follows within the next decade, giving the hockey team some time to really ingrain itself in the community.
Again, this is a chance for every single sports minded Las Vegan to represent a hockey team versus anything else. It can be just like San Jose, unique in that the city itself is almost defined by it's hockey team. I don't thin that can be overlooked.
ETA: For a few years with the IHL Las Vegas Thunder we were popping 8,000/game with a 1.25 million population.
Our previous mayor was elected on a platform of:
1a. Revitalize Downtown
1b. Bring pro sports.
2. Drink gin.
Once he was term limited out, we elected his wife on almost the same platform.