Mark has a 2012 Panasonic Viera and wants to know if he should upgrade to 4K. Leo says that the Viera was a plasma TV and it's really the best quality there is. And it still works! Yes, there's 4K, yes there's HDR. But 4K is only important if he's really close to the screen. Chances are, it won't be all that much of a difference. HDR, on the other hand, offers superior dynamic range. But unless he sees them side by side, he might not notice it. So Leo advises keeping that plasma TV until it dies. He can always upgrade then. And when he does, he's going to want to get an OLED. The longer he waits, the cheaper they'll get.