"useful" is too coarse a metric. It includes the concept of what you can build or create with a device. A personal computer wins that by a long shot. It inclu

"useful" is too coarse a metric. It includes the concept of what you can build or create with a device. A personal computer wins that by a long shot. It includes accessibility- pre-literate and illiterate people can use an iOS device. It includes the risk. How many iOS users have suffered viruses/malware vs laptop users?