Covering unsightly garages/garage bases with giant bilboards

I hope the title speaks for itself. Parking garages and the garage bases of highrises, most notably the most hideous ones--can we rethink them? I know some of you don't like bilboards, but they can often add a splash of color and visual interest to the streetscape. And how about some of those giant, animated bilboards? I'm not advocating for them everywhere, but perhaps on the most heinous of garages. The other benefit is that property owners can profit from them. Any opinions?>