What kind of “home creation” work requires something that is only as powerful as a phone, but must be done on a keyboard and large screen, and the keyboard and screen dock station must cost much less than a real laptop for it to make sense?True but this doesn't really fit my experiences / observations at least here with friends and family. Most people aren't interested in tech and writing long forum posts. They usually are mostly fine with a smartphone alone and if they even own a laptop (forget desktops) it's only taken out if one needs to write a document which is rare enough. The power even of the current iPhones i more than enough almost all people need. All they would need is the needed peripherals for "creation" work which happens at home.
So laptops aren't really used in a mobile way besides putting it on the diner table and then storing it in a cupboard and current phones are aleardy good enough for these minor needs.
Only valid point I see is that the laptop in fact is probably easier to deal with than docking and wouldn't really cost much more.