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.
Animation Rendered in 2K
Everything seems to be changing for the better at Hotel Transylvania... Dracula's rigid monster-only hotel policy has finally relaxed, opening up its doors to human guests. But behind closed coffins, Drac is worried that his adorable half-human, half-vampire grandson, Dennis, isn't showing signs of being a vampire. So while Mavis is busy visiting her human in-laws with Johnny - and in for a major cultural shock of her own - "Vampa" Drac enlists his friends Frank, Murray, Wayne and Griffin to put Dennis through a "monster-in-training" boot camp.