I asked Dolby's experts if Dolby Vision 2 HDR could come to 4K Blu-ray, and it turns out all we'd need is a software update to players — except one maker already said it has 'no plans' to add the upgrade

Dolby confirms that Dolby Vision 2 HDR can come to existing 4K Blu-ray hardware, including both discs and playersHowever, it will require the player manufacturers to work with Dolby on updates, and Sony says it has no…