You can thank my (ex) wife for it.
Being lazy when I hung my projector I simply ran an extension cord to it, the feed side dropped down behind the rack (for UPS) through a grommet in the ceiling, the rack rear shared the same space as the washer/dryer. When she saw the orange cord hanging down she told me that I was (in theory) a professional and that it was not expectable. Wandering around the garage looking for a way to make her happy I came across an old PC tower with the recessed IEC plug, "Ding! Ding! Ding!". I pulled the plug, went to Lowes for a blank Decora insert and took this project into the Metra Machine shop the following day. Once installed I realized that "Damn, I need to make and sell these".