The 'real' tower sounds like an interesting idea, but only if you operate with a crew big enough to have an engineer for each train. The towerfolks are going to be busy enough without having to control locomotives, too. Then there is the little matter of space - unless your layout is in a barn, warehouse or commercial aircraft hangar.
The 'TV screen' idea sounds too much like a NASA mission control setup. I think there would be too much of a disconnect between it and the real railroad.
Just my . Others are sure to disagree.
Chuck (modeling Central Japan in September, 1964)