The moment apple ship MacOS on their iPads, sales for their macbooks will all but collapse.
That's what I thought when they announced the folding phone, but iPad sales
What are you talking about?
A MacBook is optimized for a larger screen and comes with a better keyboard and trackpad.
I use both my MacBook and iPad all the time, because their hardware form factors are better for different things.
I don't want to read books on my MacBook and I don't want to do development or writing on my iPad.
I briefly tried using my iPad as a Mac through the screen sharing. It's not as useful as you are imagining.
Have you ever tried to do serious work on a tablet?
Absolutely sales of laptops would continue.
and increase power usage?
Will they though? They would capture more windows users. They already have the Neo actually. iPad still has another job mainly around simpler tasks. I’ve not yet got to love the Macosy windows management.