Agreed. We have a dumb Sony 40" LCD that is over ten years old. It's not 4K but our eyes aren't good enough to see the difference, and over the years we've used a range of front ends - currently a Raspberry Pi running Kodi (with the HiFiberry sound card - awesome!).
This has been very economic, and environmentally friendly, and I can't see why we can't continue for several more years with the same screen.
This has been very economic, and environmentally friendly, and I can't see why we can't continue for several more years with the same screen.