I've been using 50" 4K/60 TV's (3x actually) as monitors since 2015, and I love them. Prior from about 2007 on I used 6x 24" LCD's, and in wanting to upgrade, didn't make sense to bother with small LCD's to go vertical with another row for 12x displays. I found Samsung curved 4k LCD's at the time for around $650 each shipped around black friday, so it was a no-brainer. I've never looked back really, or would consider anything smaller now.

I am wondering how 8k displays would look replacing my current samsung 4k's as these are pre-HDR, but I'll probably use these until they start dying with no complaint. Plus no one does curved displays now, which I'll miss from my current TV monitors.