Jeff has a 10-year-old HD TV and he's thinking of upgrading to 4K. A TCL 65" with Roku built in. A good buy? Leo says he'll likely need a decoder box to work with the cable subscription. But will he get 4K? Well, that depends on his cable. And even then, no live channels really broadcast in 4K anyway. He can stream it through Netflix and others, but it requires a faster internet connection. One thing he can do is get a 4K Bluray player.