why would you all talk video cameras if a PRM radar system provides better data than any eye ever could.
the problem with that is maybe that the system is independent and the data is only ever displayed on a special PRM station in the TRACON which is likely unmanned when PRM approaches are not in use.
and with automated systems predicting conflicts maybe they don't even get the input which runway the plane is approaching. it only gives an alert if the runway is occupied which might not happen until short final as the departing traffic is lining up.
anyway after a certain history for the airport getting PRM data into the tower can't be that hard. and much better than putting a video monitor there. should even be possible to just deduce right or left side from the PRM and just display RIGHT LEFT or UNDECIDED and miles from touchdown for the relevant targets. that would also work on a small extra screen because as always integrating in the existing radar system might prove impractical.