I like it for a bunch of reasons.
At my desktop, it's easier to clear off space so that I can actually use my desk as a desk. Granted it's a rare occasion nowadays, but if I'm working out of a physical book, I prefer to have it open on the desk and the keyboard in front of it or in my lap.
My TV feed is to a different room so it allows me to do stuff on that screen while I'm physically in the room with it. When I'm at the TV though, it's usually to watch a movie. If I'm trying to be productive, it's not going to be while I'm lounging on my couch. If I am doing any heavy typing I usually throw a pillow into my lap to raise the keyboard up to desk height.
For my D&D setup, I've got two back to back screens, so it allows me to pass the mouse and keyboard over to my players so that they can use the computer from their monitor.