I was intrigued by this lens, and so I went to visit Viltrox booth today at Photokina.
They told me:
available in October
cost $379 (and not $240 as reported yesterday)
no concrete plans for other Fujifilm X mount AF lenses at this stage
More info has been sent to me by a FR-reader
Focus ring can rotate 360 degrees
Silent stm motor
Close distance cover range (?) is 136 x 182mm
Maximum diameter (?) 80mm
Lens. construction, MFT and specs screenshot below after the images
They had a Fujifilm X-H1 with the Viltrox 85mm F1.8 attached to it, so I quickly played around with it.
Keep in mind that this is pre-production, and there will be autofocus improvements and bug fixes before the release. For example, I noticed that when shooting at F1.8, sometimes in playback when checking the image, the aperture showed a wrong value. Viltrox told me they are fine tuning the firmware to sort it out.