There have been a few ideas like this before; particularly to have a matrix sign at the runway holding point, where the callsign of the aircraft with a line up clearance on the electronic strip system would be displayed. This would be in an effort to prevent aircraft lining up in the wrong order, and perhaps to mitigate the stop bar being dropped in error or left dropped after the last departure.
So rather than just having voice clearance by day, and voice and stopbar/AGL by night, add in a third method; so you have voice, stopbar/AGL and matrix sign feed from controller's strip display.
There are probably too many issues and hazards that come wtith it, but I think it's an interesting idea.