Will Westin's new non-smoking policy spread to other chains?

That's what this article on hotel-online predicts. With Westin's much-heralded announcement yesterday, nonsmokers of the world rejoiced. But for meeting planners whose attendees include a large contingent of smokers (granted, a circumstance that gets rarer all the time) and for those who plan international meetings, I can't help but wonder if this would entail excluding Westin and others that may follow suit from consideration. I know that the restaurant bans haven't turned out to have hurt them much, and smoker attendees are pretty used to going outside at convention centers in the U.S. But this seems a little different to me.