Mirasys Video Wall is flexible.
With room and budget for monitors and DS, you can make it as big as you would like, with future expansion being easy.
A single OC is easily updated to a whole wall (manual or scheduled updated).
Other benefits include
Collaborative system: multiple OC is automatically supported
Possible to control it remotely
Based on Mirasys Spotter– easy to use & learn
All Spotter plugins can be used