That's not taking into account how older machines are typically used though. Yes, you can install the latest Windows on a 1.6GHz dual core PC from 2006, but it's not going to make a great PC. On the other hand, it makes a fine host for a NAS device or some other home server, or a router/firewall, or a media PC to hook up to the TV etc.
An iPad or iPhone would do much of the same, and in some ways better or for different uses. It uses less power. It could be used as an in-wall display. It could be a WiFi repeater, or an access point given a USB ethernet adapter. People are creative, if you give them the chance. And none of those things really care if the battery is flat.
An iPad or iPhone would do much of the same, and in some ways better or for different uses. It uses less power. It could be used as an in-wall display. It could be a WiFi repeater, or an access point given a USB ethernet adapter. People are creative, if you give them the chance. And none of those things really care if the battery is flat.