Can Multipoint Services be used to extend a local desktop through RDP (not RDS)?

I have a small Windows Server RDS farm hosting RD Sessions and RemoteApps, mostly the latter. Clients with multiple monitor can drag apps across displays seamlessly as it's expected. This relates to none of that.
Recently on a Windows 10 desktop machine, I noticed it had Multipoint Services available. Coming from Windows Server I've heard of it before but I always understood it was sort of like peripheral-ad hoc-RDS, thus never really bothered with it.
I played around with it (Multipoint) a little, read the docs and found out it really is like an ad hoc RDS but not exactly in the way I assumed before, but it even goes further sort of like patching peripherals up to hack up the resemblance of an independent computer, splitting monitors to squeeze twice the active sessions, etc… All of this hackiness made me wonder if RDP could be used as means to extend a desktop (of a session, i.e; 1 or more monitors) rather than replacing it (lock session, log in elsewhere) or starting a new session with its own desktop if simultaneous logins were enabled.
Or alternatively, have the ability for a user to start multiple pseudo-independently-only sessions so, for instance, a user/staff could use the multipoint server host attached to a huge display wall in small auditorium that shows a Keynot--er..sorry, force of habit. The server shows a PowerPoint presentation on the wall and from thin clients on podiums, control booths or an iPad on the presenters' hands via Remote Desktop have a different [pseudo-independent-]desktop where they can't accidentally drag objects in or out of the audience's view while it is still possible for selected apps may share memory space so they're allowed to run only once thus can be controlled from either session with them needing to have this capability—whatever this is. As if they were services with GUIs.
Is it possible? (in either Windows desktop or Windows Server, and if it's on Server, could it coexist in an RDS session host?) Thanks!