[hdmkv]

Agree w/@wrxtasy in that if you want auto refresh/resolution/colorspace switching but don't need 3D MVC support, LibreELEC (or now CoreELEC) may be the better way to go. But, this depends on what 4K display you have. If you have a 4K projector like me w/only 4:2:2 support, then for now, neither LE nor CE are viable options.

Also, if you don't need HD audio, consider Apple TV 4K with MrMC (Kodi fork).