I understand that a significant number of injuries is caused simply by people standing on the blades of electrical plugs…even when wearing shoes, these can twist ankles.
Today’s invention is a low-profile shield into which a plug is withdrawn by a spring. When you want to plug into a socket, this casing is pulled back.
The housing would be made cushioned on the outside and might carry battery-powered LEDs -illuminated only when the plug was within it, in order to reduce trip hazards.
A smarter version could recharge the battery using the power cable’s magnetic field.