some newer Royal Bank ATM's now have a portrait digital signage screen to the left of the terminal screen.
Its a decent idea. Definitely better than way up above the kiosk on a miniature screen. Unfortunately, this one in particular (at a Shopper's Drug Mart) was plagued by lack of floor space and squeezed into a tight corner, making it hard to see.
What I'm wondering is when my local branch will be getting digital signage. They have large posters that seem to change often enough and a long lineup (especially on payday) waiting impatiently. With that captive audience and a seemingly dynamic promotional strategy, they could benefit from some digital signage.