Re...desktop continues to decline because of Windows 10
No.
Desktops are not something consumers want.
Consumers want to play games - and that's dedicated game boxes and TVs, they want to consume each others faeces book wibble, and a mobile smart slab is fine for that, and they want to watch porn, and any slab will do that too.
They only need a desktop to work, and they are the generation that doesn't actually want to work, sees no reason to work and doesn't like working.
And god forbid, we built the world that means they actually dont have to.