Here are some Comprehensive and New Features of new KDE Plasma 5.8 LTS:
Certainly the looks really get a beauty and usability enhancement with wide range of desktop widgets available.
You can get text message notifications, silenced music when a call comes (My favorite), and phone can also be used as a remote control.
There are many new other features introduced, we can not cover all of them. You may check more in the announcement post of KDE official, from here.
Download the latest release from here: KDE Plasma 5.8 LTS