I was once a consultant on a project where a notable design firm designed an operating system for a mattress that conformed to your body. The OS was based on AO

I was once a consultant on a project where a notable design firm designed an operating system for a mattress that conformed to your body. The OS was based on AOSP, so plenty of nice support for custom UI widgets. Some of the sensor inputs were easy to make use of: The mattress would be pumped up to look flat when nobody was sleeping on it. Otherwise it would look like a worn-out mattress. One of the problems to solve was to detect when the occupants of the mattress would rather have a flat surface for activities than have it conform to their bodies.