In looking around, I've come across several titles that are available to rent/purchase in iTunes via the Apple TV 4K, that are in Dolby Vision. But when I look at the 4K UHD Blu-ray releases of these same titles, they were never released in anything but HDR10. So is Apple/iTunes converting them or are they updated releases just for iTunes? One example is Mad Max: Fury Road. There are others. Hmm..