The new Apple TV 4K is very reliable multimedia streamer and with tvOS12 Dolby Atmos will be added. So it will play 4K, HDR and Dolby Vision and even supports Dolby Atmos. Furthermore you can download a variety of APP’s such as Netflix and AmazonPrime for streaming movies and TV series and of course many more things.
The movie collection in the Apple Movie store is big and very fast with releases you can even make a pre-order so you can watch your favorite movie the minute it is released. Pricing is very competitive with other streaming companies. You can rent or buy the movie and they even have deals each week.