Yeah, I suppose that makes sense. I run a non-native scaled resolution on my rMBP and it looks great. I suppose the same would work on this kind of monitor as well.
Personally, I'd prefer the desktop real estate that native 4K offers but that means 32" minimum to be usable.
Exactly! I'm in the exact same spot as you are. Never used a 32" though, but I can imagine it would be awesome due to the real estate it would offer!