As i understand it (and i may be wrong) whilst the tower controllers will remain at the airfields the approach / radar controllers will still be centralised at Inverness. I think this was part of the agreement reached between HIAL and Prospect in October 2021 (Someone please correct me if i'm wrong)
This seems to make sense to me (after all it's been working fine for LHR / LGW / STN / LTN etc at Swanwick for a while!).
I expect the remote tower concept will go quiet for a few years then be resurrected once the radar hub is established and the remote tower technology has become more mature.
I imagine that finding controllers for these remote airfields who are satisfied to be tower only and not obtain or maintain their approach / radar qualifications will be a challenge (which may then be used as justification for introducing the, by then, more mature virtual tower technology).