Was thinking about this the other night. With how Ubuntu Touch is falling on it's face, and KDE Plasma Mobile seems dormant, what about bringing
back KDE Netbook Interface as a touch-enabled interface for tablets and 2-in-1 devices.

Refocus Plasma 5 more toward the Desktop like 4 was, and utilize the Netbook option for touch devices?

Just an idea. Don't know how much that would take to add it to Plasma 5, but it would give a viable option for Linux on smaller format devices.

see viewtopic.php?f=289&t=126631&p=335947&hilit=plasma+netbook#p335899 and
https://wiki.archlinux.org/index.php/KDE

Space efficiency
The Plasma Netbook shell has been dropped from Plasma 5, see the following KDE forum https://forum.kde.org/viewtopic.php?f=289&t=126631&p=335947&hilit=plasma+netbook#p335899 post However, you can achieve something similar by editing the file ~/.config/kwinrc adding BorderlessMaximizedWindows=true in the [Windows] section.

Although you can get similar Kwin behavior in Plasma 5.x(latest is 5.8.5 at time of this post), I think what we want is something like the old "Search and Launch" desktop layout.
I would like to have the "Search and Launch" layout back as well, back in KDE SC 4(which I still use on some of my machines to this day), it was my go-to desktop layout on my desktop and my laptop, even on my TV-media-center, it was a shame to see that it is no longer present in Plasma 5.