Funnily enough. was talking about this with oldest child today. She's just graduated and started work. Her work laptop is fine for a bit of typing and record keeping at home. In the office she plugs it into a full grown machine with a nice screen and keyboard. For report writing, and any serious typing we both want a full sized keyboard and screen. So a tablet, let alone a phone, is of no use to us.
But, for all the people at home who only ever used a PC to surf the net or play Candy Crush there is no use having a PC/laptop whatever. That market is dead.