I don't think the "wow factor" isn't about big and lavish cities, but about being somewhere new. While I was wowed when I first went to Hawaii I was also just as wowed whenever I get to go to a new place. It's not about how lavish the place is, but what there is to do there and what memories are made. What I remember most from worlds last year (which was my first worlds for reference) wasn't the lavish hotel I was at or the breath taking views, but being able to hang out with all my friends and making new friends while playing a game I love. Those are the memories that will last throughout my life, not the city I was in. Each city has something to offer and that's what makes it a unique place. It's called Worlds, not Hawaii and California. Showcase some other great cities!
London, Madrid, New York City, Chicago, Toronto, Vancouver, Hong Kong, Tokyo, Maui, San Francisco, Paris... the list could go on and on for me.