I have been catching up with this thread and reading others and as I have said elsewhere, even before the rumors, I am confident Apple knows well iPadOS needs improvement and they will indeed improve multitasking.
What's funny is that, given the low expectations after the lackluster past 2 years, people will be very excited and start saying, iPad pro is finally fixed... Personally I don't think improved multitasking will make a huge difference.
Sure if they allow extended display support, that would be a big step forward (but the rumors don't mention much about that), but will still be far from turning the iPad pro into a MacBook replacement for a ton of people.
The main reason is that this won't bring any MacBook apps to the iPad. No full MS Office, no background syncing Dropbox (or any other cloud service), not even desktop Whatsapp for the many millions of professionals outside the US who mainly use Whatsapp to communicate with their clients instead of e-mail or SMS. Let's not even talk about Parallels and the possibility to run Windows-only software on Macs.
Only full MacOS (either as a virtualized "app", in dual boot or in some sort of sub-system), of course in addition and not as a replacement to iPadOS, could accomplished that. But, as I have said many times, that's not in Apple's interest.