Announced in early May, UnityX is the successor to Unity7, and, the next major release, UnityX 10, is planned for later this year as part of the upcoming Ubuntu Unity Remix 21.10 distribution, which, of course, will be based on the forthcoming Ubuntu 21.10 (Impish Indri) operating system release.
UnityX 10 promises great new features compared to Unity7, including a new sidebar design for the application launcher and the opened apps view, a new panel with system tray icons, including for standalone Wi-Fi, Bluetooth and PulseAudio icons, a Logout shortcut, as well as an pplication launcher and an “opened apps” shortcuts.