It's "s" mania! Not only Apple but also Fuji is about to launch an update X-E1 by adding an "s" suffix :)
Fujirumors reports that the X-E1 successor will be announced before the X-PRO1. And according to the Chinese site xjrumor it will be called "X-E1S". It will feature the same sensor and viewfinder as the current X100s.
And just for fun...watch the iPhone 5S parody video on top. I am sure the Fuji "S" suffix will be more appealing than the iPhone 5S that will be launched tomorrow :)