And I don't know how anyone can sit in a desk chair all day long.
Here's how it works: wireless mouse on a table next to me. Keyboard on my lap (with the wire plugged into a front-side USB port). Feet up on the matching Poang footstool. Monitors about six feet away from me on a regular desk. Appropriate text sizes in Emacs and terminal, and appropriate zoom levels in Chromium. (Chromium remembers per-site zoom levels automatically.)