It looks like a fully featured interface for sending SMS messages (with the full conversation history and a proper contact list) an a new plugin to cast on a KDE COnnect powered display are coming to KDE Connect. KDE Connect is a project that helps integrating Android devices with Linux desktops, allowing you to receive phone notifications on your Linux desktop, easily transfer files between Android devices and a desktop, use your phone as a desktop remote control, synchronize the clipboard across devices, and more.