Netbook – Kuribo
Fedora – KDE 5
2015:
KVM VM – Blargg
Fedora Rawhide – KDE 5
2015:

KVM VM – Tuxie
Korora 22 – KDE 5
2016:

Desktop – Super Mario:
Fedora – KDE 5:
2016
2015
KDE 5.3 does not allow for different desktop backgrounds and widgets per desktop, so just one screenshot per activity: