It is not real 4K in any material way due to the animation being rendered in 2K. Studios have upscaled the 2K image to 4K for your 4K UHD TV. You should see some visual improvement over a standard 1080p Blu-ray. Animated CG movies scale up very well and can look like Real 4K. Check the information below to see if the studios have upgraded the video with HDR or added immersive Dolby Atmos or DTS:X audio tracks.
The movie takes us to an island populated entirely by happy, flightless birds - or almost entirely. In this paradise, Red, a bird with a temper problem, speedy Chuck, and the volatile Bomb have always been outsiders. But when the island is visited by mysterious green piggies, it's up to these unlikely outcasts to figure out what the pigs are up to.