Isaac has a nice Sony home theater system. But with 4K, he wants to know if the difference in quality is worth rebuilding it in 4K. Leo says that Blu-ray is not only 4 times the resolution as 1080p, it also has the high dynamic range and that's more important. If his home theater supports HDR, then there's no problem. If not, he may want to think about it. Moving forward, he can start picking up UHD HDR Blu-rays for his collection. Billy Lynn, Master and Commander, the BBC Earth series — all are excellent.
Ron wants to know if it's worth the money buying a 4K Blu-ray player. Leo says only if he's planning on buying a 4K TV and only if he's planning on getting one over 55" in size. Then he'll want not only a UHD Blu-ray player, but also a 4K TV that supports HDR.
Leo bought the XBox One S with a 4K Blu-ray player, but it meant that he had to buy a 4K TV. So he bought the 65" LG B6 OLED 4K TV. Leo says it's stunning how thin the TV is. But then he had to buy the Denon 910 because the UHD signal couldn't pass through his old AV receiver. That also meant he had to buy cables. Scott says that Leo didn't have to buy new HDMI cables unless they were really old ones. Any HDMI cable from the last few years should be able to handle the 18GB connection required. The real key is the ports on the AV Receiver.