I got a NUC as Christmas gift, and it was more than welcome. I hope to use it as the post-desktop device for plenty of purpose, mostly just by turning it on and interacting with a WiFi-capable gadget...

[ongoing] be the music machine of the living room
It is not too noisy with its fans, gets a jack output and can easily fit next to the HiFi system. I can use the WiFi connection to quickly view which song is being played, skip to the next song and switch between "fairy-lover" or "chiptune-lover" modes, from any device in the house including smartphones and tablets.

I would still need to let it learn which songs are less liked, or migrate some titles to other folders, etc. Preferably in a way that would not take effects immediately, but rather that is approved over ssh after having been collected during play sessions.
[done] make Fairy's laptop devkit-free

Fairy's laptop still has a battery. Mine is now powercord-tied to the ground. Fairy's one has poor resolution but increase mobility, but Fairy's one isn't always there, so it would be better to use it just as a remote terminal to the NUC instead.

[ongoing] let it serve (auto-generated) epub doxygen
That means having it a mercurial hub with improved features. I use to have something like "nohup hg serve --webdir-conf /path/to/hg/hgweb.config -p 5555 &>/dev/null &" at work, where hgweb.config is simply a list of 'printname = full/path/to/repository', where printname may be 'orga...