This will be great news if they do end up accepting bitcoin in their stores. Adoption would skyrocket very quickly and many new people would be introduced to it.
If that happen many user of bitcoin will be glad because when we use bitcoin in McDonald it easy for us to make transaction. Also it will be great news because its means some fastfood store is accepting bitcoin, so i think this is the first step to become known of many fastfood store or maybe in resturant.