Librem 5 devkit displaying phosh with an expanded top bar with completely different layout and much more limited functionality than what we're used to today. There are two sliders (volume and display backlight brightness), manual toggle for screen rotation and three buttons in the row: settings, lock and power off. In the background there's Calls window visible (which, actually, hasn't changed that much).
https://social.librem.one/system/media_attachments/files/014/359/667/original/f1a7bb2342184076.jpeg