The upcoming firmware update for the Fuji X-Pro1 will increase the autofocus speed, but the really big improvement will come with the new XF lenses that will have a new linear AF motor. The upcoming X-E1 camera and XF 18-55mm f/2.8-4 lens combo will be able to snap focus in 0.1 seconds (similar AF speed as the latest Panasonic cameras). I am not sure if the X-Pro1 will be able to deliver that speed after the firmware update - I believe that the new X-E1 will still have a faster AF with the new lenses compared to the X-Pro1. My understanding is that all future XF lenses will have the new AF motor, not sure if the current three lenses will be updated as well.
