Deuce, you need to keep in mind how YOUNG gaming competition is. Sports have been around for a very - VERY - long time. Gaming has only really picked up in maybe the late 80's early 90's - and I want to think even later than that.
There is no way to say it won't be as big. As far as I'm concerned, with how well game competitions are doing nowdays in so quick a time, and with countries like Korea nationally participating, gaming competitions will at least come close to the hugeness of sports.
I also strongly believe that the sports intustry is going downhill nowdays, but that's a different topic.
And how can you speak on the account of other people, saying that people who go to tourneys would rather play online? That's all objective wouldn't you think?
Let's say these people are only going to the BEST tourneys... WHY would you ever, as a respectable gamer, seeking competition, go to an online tourney instead? There is a social element that I can't explain, but I'm telling you that I myself would ALWAYS rather play real people face to face in the same location than over the internet, simply because I would be getting far more out of it, on a skill level, on a social level, on a mental level, and a physical level.
Also, remember that ANYONE can play online tourneys, the REALLY skilled people are often found at the real tourney events. Going online will put you against people with potentiel skill level FAR below yours.
Just my thoughts.