Fujfilm launched a teaser page on their website hinting toward what looks to be the next model in their line of retro-styled X series camera bodies, the X-T1, which will be announced on January 28th.
The biggest design change from previous Fuji mirrorless bodies like the X-Pro1 and the X-E2 is the hump in the center, no doubt housing a viewfinder. EVF tech has come a long way in the last year or so, so it isn't surprising that Fujifilm would update this part of their cameras so that it could compete with the terrific viewfinders in the Olympus OMD E-M1, Sony A7, and Panasonic GX7.
The X-T1 design cues fall right in line with Fuji's retro style. The addition of of the hump in the center has caused many to equate it with the Olympus OM-D line, which was the first digital mirrorless to integrate such a feature. However, I think such a protrusion from the top of the body can house essential EVF circuitry and place the eye-piece in a more comfortable position.
As far as guts, the X-T1 is rumored to contain the same 16 MP APS-C X-Trans II sensor as in the X-E1, as well as weather sealing and an improved autofocus system. We will have more details as they are revealed! [MirrorlessRumors]