I think you already found one usage!
It can also be used in cases like this (it's just eye candy, but some people like it). Jumobtron effect for a fight in a stadium.
The limitation is that the zoomed in area cannot be _in front_ of the jumbotron (copy effect), so it would need to be higher than the action.
I was also experimenting with using it for psuedo 'stereo vision' for a HMD for my FQZ plugin or EQR effect, not quite working yet, but it seems possible.