Hmm. My home office is about the same length but double the width (room is like 10 sq meters). It only has computers and not music gear/flight sim controllers though, so less cluttered. And a proper ergonomic chair :)

But now that I think of it, most of the time I spend in there I'm sitting at my chair and looking at the monitors. I never look back. So I'm basically using the same space as this office.

Maybe subconsciously knowing i have some space behind me before I hit the wall helps...