I really liked the Fujifilm X-1 Pro when I tried it for a couple of weeks — enough that it made me think seriously about switching from my much-loved DSLR about five years earlier than I thought the technology would be ready for me.
There's some painful UI quirks it might take a bit to get past, and on Linux I think I'd really have to cope with being a JPEG-only shooter, but the dealbreaker was really that autofocus speed was so, so, so bad. It just wasn't possible to get in focus pictures of my kids when they were posing, let alone in intentional action.
But, the v2.0 update of the firmware, promises significant improvement. Fujifilm says
Auto focusing speed has become much faster under a various shooting condition such as dark scenes, bright scenes and so on.
And the very short test video on DPReview sure looks like a good thing.
But I'm interested in real-world reports, here. How does AF with the updated firmware compare to, for example, the Olympus OM-D EM-5 (which I found to be startlingly fast for contrast-detect autofocus)?