These are all the Echo Devices we've seen across the Borderlands games so far. Weird to think that before BL3 those others were also canonically responsible for projecting your menu. 3 actually
ECHO Themes - Borderlands 3 Cosmetics Galleries
The Echo-2 at Borderlands 3 Nexus - Mods and community
Borderlands 3 - ECHO Device Prop Replica by Chronicle Collectibles - The Toyark - News