Japan didn't get most of the IDW comics and are the target market for MP. They basically know windblade from a few crappy pack-in comics and a show that wasn't particularly popular there. Unless they start cranking out Cyberverse MPs, it's not very likely.
Maybe now that the PS5's made the whole 4K thing a little more mainstream, the hardware will start becoming more common. I know that's one of the hopes the physical media community has for the 100GB discs the PS5 is going to be using. Prior to this, they were very expensive tor replicate compared to a regular blu-ray and not used very often
Up to now, there really haven't been a whole lot of 4K disc players to choose from... Samsung stopped making them altogether when they couldn't compete with the others, so your main choices are a few models of Panasonic or Sony
My only TV with a respectable number of ports is my OLED 4K/3D, which has 4 HDMI, 2 USB 2.0s, 1 USB 3.0 and some weird proprietary thing that acts as both component and composite, depending on what you need. But it retailed for $10k when it first came out (I bought it 14 months later for less than half that). THey're going to get as many corners on less expensive sets as they can, which usually means only providing 2 HDMIs.