Actually - the more I think about the question the more I realise that I don’t want an iPad to do laptop tasks - as a designer I want the interface connection that comes from Pencil + touch interface on my MacBook Pro...
Really you want to be able to casually use your iPad as a kind of input device to the Mac sometimes. Also to pick up a task you’re engaged in on one device and continue in another, back and forth. I started this comment on an iPad; as it has turned out to be more than one sentence I should be able to finish typing in the Mac (a much better experience), pressing “reply” on either device and continuing on.
To channnel Conways’s law: Apple’s flat yet strictly siloed corporate structure makes things like this almost impossible.
I’m still a little surprises as MBP having no touch interface. Another option would be if the touch pad and the touch bar were fused into one product, allowing a bit of pencil interaction