The hard part I'm having is playback with all the bells and whistles. Afaik, support for HDR10+ output on computers is sketchy, but blu-ray menu support on playback platforms (android tv, webos, tizen, roku) is non-existant. Anyway, most devices top out at 100M ethernet, which is below the max bitrate of 4k blu-ray (peaks of 150Mbps). I've heard good things about Apple TV, but also that it's very difficult to manage unless you've got other Apple products, and my Apple IIe doesn't count.
I have a 1G Android TV device, but it still stutters in playback of high bitrate scenes when I ripped to a mkv.