I honestly don't think that Mage Wars will have the tourney scene that MTG does, but trust me, that is largely a good thing. Seriously, you do not want the fickle financial and social dynamics Magic has. However, I do think Mage Wars, if properly nurtured and with enough player/company support and playtesting, will have a follow-able, compelling, and dignified tournament scene.
As with most games in general, I think local metagames are going to be the driving force behind what is seen as "competitive" Mage Wars, though I do think there are cards that are more geared towards competition and cards that are geared more towards flavor. And really, that is perfectly fine, because the distinction between competitive and casual cards in Mage Wars is far, far less exclusive in scope. In other games, the depth of competitive play is marginal at best, because you can expect most cards not to be competition-worthy.
All in all, tournaments are going to be a reality as long as people desire to be competitive (that is, to say, quite a while
), and maybe some people will like the hype and others won't, but the great thing in this game I have experienced so far is that the gap between casual and competitive play is rather small. That is, playing for flavor and playing for strategy is a much more married reality in MW, and that is a very good sign of a game that will endure in both casual and competitive social spheres.