I just started using a KDE Plasma desktop - after having used a very minimal Openbox environment for a very long time - so this comes at an opportune time for me.

BTW it's the oldest still active DE for Linux and I suppose other Unix-like OSs.

And they're doing pretty interesting stuff in the mobile sector.

But it's just a trailer.
OTOH I'm not sure I even want to see a full length docu about it.
Something in between would be nice.