I have not been so excited about a new camera for a long time...since the Nikon FM in 1977.
I have been trying hard to gleam details out of the Internet chatter and now various "hands-on" reports at Photokina.
The most important is of course the VF...no good in VF, no good in views found.
The OVF has a 0.5X magnification, which is independent of and wider than the sensor; and provides an extra 33% of the 35mm frame covered...ZI style. Framing accuracy is said to be 90%, with accurate parallax correction...far or close.
In EVF mode, the coverage can only be exactly as the sensor or 100%. I have seen an O/E switching image sequence that confirms the important DoF latitude bar within the distance scale shifted up slightly and wholly preserved. I have not been able to determine from second-hand comments whether the effective view is somewhat magnified or not. If it did take up the entire OVF space, then a ~0.65X will result.
[I can imagine a Fuji or third-part eyepiece magnifier...or even a home-made one if I am so inclined.]
The mini focusing quadrangle [a smaller frame, not a patch] in the view centre is present in both O/E modes...no doubt to help picking the auto-focus aim point. A combined AEL/AFL is provided in the back/right. With my maturing eyesight, that is not a bad thing.
I cannot confirm, still, whether the lens focusing ring is functional or decorative. A somewhat loose comment about the aperture/focusing ring is heard. Images showing the aperture ring rotated are available, but the focusing ring not...at least the lens front ring markings has not been shown rotated; or maybe the lens sports internal focusing.
Addendum: an engadget video shows [sort'a] the rotation of the focusing ring, then the aperture ring.
Fuji's online literature labeled the thumb wheel [back/right] as a "Convenient command lever". Some show photos did indeed confirm that there is a lever-like protrusion. Elsewhere, Fuji people was reported to have said the fixed lens implementation is better for maintaining quality for "ZOOM" [implementation]...might there be a zoom version in the works???
If so, the thumb lever would now make sense...most pocket digicams use similar lever for the T~W zoom function. It would be child's play for Fuji to add that labeling between now and product release.
Speaking of zoom, a moderate wide~tele is my preference...3X 28~85mm.
What about a wide~wider zoom? If so, the X100 will be an M-10 killer...still-born.