alt Hacker NewsThis is something it is actually able to do. I would like it to be more of a standard feature on monitors and TVs. When it came out it seemed like a unicorn, it still kind of does.
It's an LG 43UD79-B. According to LG's site[0], it's discontinued. I got it from Costco in 2017 for $550, but it was sold many places at the time.
Doing a quick glance at LG's current lineup, there isn't an obvious successor.
It looks like Amazon has 1 person selling it used[1], but in 6/10 condition and no remote, for double the price of new... While it looks the remote is also being sold places, it's pretty useless without the remote. The seller has sketchy ratings as well, I'd stay away.
[0] https://www.lg.com/us/monitors/lg-43UD79-B-4k-uhd-led-monito...
[1] https://www.amazon.com/LG-Electronics-LED-lit-Monitor-43UD79...
Being able to multiplex seems like an obvious feature to someone like me, but most people would probably just prefer picture-in-picture. I can see why it wasn't a feature that lived very long. Sounds like a great idea in design/feature meetings until the users tell you they don't care about it.