Mine reflects whatever show I am watching or rewatching at the moment usually.
Well, this one's on my laptop, which I use more. My desktop has a screencap of Talyn (Crais' ship) from Farscape
and it's been the same for years.
Looks like some kind of space show, similar to that one show, you know, that one with action, adventure way out on the frontier, where they all pack pistols and take down the villains. You know, Gunsmoke