The iTunes 4K digital is Dolby 5.1. We watched it last night. It looked and sounded terrific. For $5, I am a very happy camper! If the price for the digital had been $14.99 or higher, I would have probably opted for the 4K Blu-ray. But for 5 bucks, hard to resist!
Mark
The 4K digital is currently available on iTunes for $4.99 purchase price. Not only no slipcover to take up shelf space, no case or disc to store! :)
Mark