Your guess is very wrong. I've been using my deck as a laptop occasionally, and I've seen a lot of posts on a sub on the recently deceased site of people using it as such. And why not? It's basically a touchscreen laptop without a keyboard and with a small screen.

Also, the deck does not replicate a subset of the desktop experience, it just contains a desktop experience. Unless the KDE desktop is not a desktop now. If that's the case - it runs windows.