Its curious they have brought down the store. If they are were only going to talk about the watch and its not available til next month then there's no reason to bring down the store.
So hopefully they have some other wares to show us today.
Could just be for updating pricing on Watch.
My guess is for another product, available today. Capitalize on the fever & get your money twice: today + next month = the thinking of the most successful company on the planet. Plus announcing an "available today" product might mask any Watch sticker shock.
Either way, the global geekness is at an all-time high. And they know it. Masters.
I still maintain: the best part of any keynote are the moments leading up to the lights dimming and the house music stopping. At that very moment, any- & everything is possible.
Have fun, kids!