It will come soon, but take in account that other cities do not have it as good as we have it. In Los Angeles we have almost any coral at a 1 hour drive. And the reason other cities have these conferences is because they are willing and able to pony up the cash to make these events profitable to the sponsors.
Here in SoCal we are spoiled and absolutely would fill to the brim the event, but I think the industry likes to keep it fresh and rotate the sales. But I know for a fact a lot of major collectors live outside of California.