The thing I would like to see is a second purpose for smart phones, an afterlife, calculator heaven?

It doesn't have to be cheap. It might for example resign into a security camera or a doorbell. A metal bracket with a connector, a button or a connection for one, a seperate psu with a bell or a relay for one, screws to attach the wires, perhaps a stripped down end of life OS (altho it could just be a mode) and it becomes a very good doorbell with motion detection, a good amount of storage, two way video if you want it. Share with someone [temporarly]. Backup footage on laptops, pc's, phones, storage devices etc etc

For $100 in parts it would be highly competitive in the space but it could be more expensive as it can basically do everything a $1000 security camera offers and more. Battery backup, sim card, etc. A big phone brand might even be able to get a contract with local law enforcement so that they can have/request [emergency] access.

It's just one example, a small/portable computer could resign into many things. The device only needs to know it is now a TV remote control.