An underrated aspect of the SupCom engine was that it natively supported multiple monitors, with independently controllable cameras on each one so you could keep an eye on any two parts of the map, or just zoom the second one all the way out to get a giant minimap. That's something you never see today even though it would be easier to pull off with modern graphics APIs (IIRC SupCom actually runs two copies of the gam…
Slightly less impressive was the minimap, which was also an entire second(third) copy of the game's graphics process. (Although really you weren't 'supposed' to use the minimap, since strategic zoom took its place.)
In a similar vein, I think fallout4 lets you use an ipad as a pip-boy to do maps and other management things.