Jason Snell, writing for MacWorld on what Apple may introduce in 2020:
If I ran the zoo, though, I’d consider beefing up iPadOS’s cursor support and building a new iPadOS device—let’s call it iBook, because I’m in charge now and won’t be denied—with attached keyboard and trackpad. An iOS laptop. All the pieces are in place. I’d love to see it—but alas, I don’t really think it will. 2020 is a weird-sounding year, but an iOS laptop is too weird even for 2020.
I think the mouse and keyboard support is likely: the ability for users to buy an iPad and some accessories and have all of their computing needs met. We’re not far from that now.