Hulu is finally offering 4K and 5.1 audio on Roku devices
https://arstechnica.com/gadgets/2019/12/hulu-is-finally-offering-4k-and-5-1-audio-on-roku-devices/
The long, give-and-take saga of 4K streaming on Hulu continues with the addition of 4K streaming for supported Roku devices. Hulu also added 5.1 surround sound capabilities on Roku.