Anyone buying 4x 1080p now will wish they bought 4k in a few months. It's similar to when LED screens came out, LCD monitors were given away. Or people recommending plasma tv's when LED came out. What did you do, buy HP SFF at the corner box store? I guess you put the warranty to good use. hahaha
No, not from the "corner box store". Even if I had, it was still an HP. (Yes, under warranty. They paid for the repair, but not for the scorched desk...
)However, you're correct about the "progression" of video displays. Makes total sense to buy a 4K TV to serve as monitor rather than 4X 1080ps. The former problem with "TVs as monitors" was about "large pixels viewed from short distance". Today, 4K pixels are so small, 4K TVs serve well as multi-monitor displays.
I've been involved in "multi-monitor for trading" from waaay back and expensive. It's better now and more affordable than ever. (Interestingly.... my initial involvement with ET was about multi-monitor expansions for trading.)