Fujifilm X-Pro-1 Hands-On: Intoxicatingly Simple | Gizmodo Australia
"The cameras one drawback, and Fuji has told us that this will be the case on the production models, is that the autofocus isnt going to be as snappy as it is on other cameras. Fuji says thats because thats not what this camera is about. Fine, but its going to annoy the hell out of you if youre used to a good point-and-shoot camera or DSLR."
Looks like this is going to be a deal breaker for me. That's the precise reason I got rid of my X100. The other deal breaker for me is the lack of built in flash and the optional small flash EF20 make the thing much bigger. And the other thing is that I wanted a zoom and the zoom coming out 18-46 F4 is two stops less than the X10.
Comparing the X10 at ISO 800 with a X100 at ISO 3200 to simulate the two stop difference, via the studio comparison tool shows that the quality is similar in terms of noise.
Studio shot comparison: Digital Photography Review
So I'll probably skip the Pro1, unless the Pro1 noise levels are at least 3-4 stops better than the X10. Or wait for the generation X100/Pro1 which hopefully will have better auto focus.