What is that thing called that shows the "distro"? design, I see it all the the time in /r/unixporn Also I'm looking forward to when phones get cheaper that ha

What is that thing called that shows the "distro"? design, I see it all the the time in /r/unixporn Also I'm looking forward to when phones get cheaper that have more ram so can run dex or something similar, not quite "dual boot" but something where you have a full os working somehow(maybe virtualized though maybe poor performance)