Have you used multi-monitor setups before? Anything more than about two screens, and I personally find myself getting really annoyed because I have to turn my head instead of moving my eyes. I feel like a full-wall monitor would be even worse.
I've been using a 39" Seiki 4K monitor for my application development 'needs' for about 2 weeks and I have to say 4K is a substantial step forward from 3 or 4 1080p screens. HDMI 2.0 is great because - especially for desktop use - we can increase from the 30Hz limit of HDMI 1.4.
Yes, I've used multiscreen setups before and always wanted more. I always have multiple apps running, which means that I have to flip from one to the other if I can't just turn my head. If it's paperwork, I tend to spread it out on my desk rather than keeping it all in one tidy stack and bringing each page to the top as I need it. I'm sure there are large screen setups I wouldn't like, but in general I'd rather turn my head (or my gaze) than repeatedly swap things to the front of the stack.
