I was rocking an "HD ready" TV from 2007/2008 untl May this year. It still works, I've just put it in another room.
OLEDS are beautiful tho, my LG cx breathed new life into games.Been using my first 1080p TV since 2011. It's my bedroom TV right now. Still works pretty well. What's crazy is that the time difference between getting that TV and my current living room TV is less than getting my living room TV to now. I want to upgrade but haven't felt the need to yet.