Fuji mentioned two new features that seem pretty big for potential owners of the new x100s.
One thing that's been on the Fuji user's wish list is the inclusion of focus peeking. Here's an example of how focus peeking will look in the viewfinder:
"When manually adjusting focus, this function emphasizes the outline of the subject focus plane allowing smoother and more accurate focusing." Basically it designates a color for the highlights (white in this case) to show the point of focus. It's not necessarily a new feature, but focus peaking is still a great addition for both the x100s and x20. Along with that is a new, but strangely familiar split image focusing available only in the x100s.
"Making use of the built-in phase detection pixels, the X100S is the world's first camera to offer a Digital Split Image feature to help you manually focus your shot with greater precision. While checking the split image displayed in the LCD monitor or EVF, you can manually adjust for pinpoint focus - especially helpful when working with a wide aperture or shooting focus-critical macro images."
If you've ever used a traditional rangefinder, the x100s' manual focusing might remind you of a split prism viewfinder. You basically line up the center square with the rest of the image, but in this case it seems to be a little bit more sophisticated. Retro-inspired design meets retro-inspired tech.
If manual focus isn't your thing, there's always its speedy 0.08 second auto-focus speed. They're claiming it's the worlds fastest, but we'll have to see when it starts shipping in March. It might be a good year for Fuji if this camera lives up to expectations!