My understanding is that telephone, cable, and power providers share the poles. Don't the power companies usually own the poles? So if they added internet providers to the list of companies authorized to share the poles, AT&T wouldn't have grounds for complaint. Since internet providers (such as AT&T) already share the poles, this seems like a reasonable move.
In my neighborhood we had 2 competing cable providers for about a decade, and they managed to share the poles (along with the phone company and the power company) without any problems (or at least, any problems that made the news).
In my neighborhood we had 2 competing cable providers for about a decade, and they managed to share the poles (along with the phone company and the power company) without any problems (or at least, any problems that made the news).