I would generally prefer a desktop computer when I'm at my desk, so it would be great if I could use the iPad Pro I already own to achieve that last 5% instead of needing a laptop that almost never moves (that said, I mind a lot less since I ditched the hot, noisy 16" MacBook Pro for a MacBook Air M1).
Unfortunately, because my work is software development (specifically web development), I can't do any of it without also involving a "traditional" computer to do most of the heavy lifting. A lot of people will think it's stupid to want a way to spin up local servers on an iPad—a system which has never even claimed to entertain such capabilities—but the hardware is more than sufficient. It's a shame to not be able to use it to its potential.
If they are sensible about it, unification would be fantastic.
My 12.9 inch iPad is great for casual reading, browsing, casual games, drawing etc
My 13 inch Mac is great for serious work - programming, PowerPoint, excel, and anything slightly more complex that requires productivity.
Inside both of these devices is the same M1 processor, the same amount of ram, approximately the same screen size and I can add a keyboard to my iPad - so why should I carry two devices?
(I know I don’t have to carry both devices and I could just pick one, but some things are just better on the other side of the fence. My dream laptop is an iPad that can dual boot iOS and Mac OSX, but if a unified OS can be achieved without compromises that’s even better!)