Typically when I see people sitting close to ~48" 4K TVs for productivity they have to rely on window tiling to make it more akin to using four 24" 1080p monitors that happen to be joined together, the display is simply too big to comfortably work fullscreen like you can on a dense 24-27" 4K-5K monitor, which is the "Retina experience" that Mac users are accustomed to. A TV gives you the 4K pixel count, but distributed over so much area that in practice you can only focus on a small subset of it at once, which is basically the same problem the Vision Pro has.
I've had to do this lately and apart from the fact that my portable pc can only do 4K at 30Hz it works quite well and gives you LOTS of room for putting HD sized windows aside but that you can glance as needed. Does anyone have the same experience ?
I use a 43" 4k TV, and I find that splitting the monitor into full height 1/3s is the most useful to me. Vertical resolution is gold for software reading and writing. And 1/3 of the screen is typically enough width that most websites don't look oddly cramped.