All machinery in your plant, regardless of manufacturer, communicated in the same exact way—no need to have proprietary interfaces for each piece of machinery, just one centralized place to monitor important information.
Your machinery could tell you when to plan scheduled downtime maintenance based on its real-time analysis of itself with detailed information of what needs to be worked on.
Your ERP system could dynamically adjust your plant capacity and lead times based on real-time machine performance, not theoretical assumptions that once set are rarely changed.
You had the ability to receive alerts and alarms from this centralized system so that you could manage by exception rather than by monitoring everything individually
Your ERP system could automatically create and issue purchase orders for needed machine parts in a just-in-time manner.
Environmental conditions in your plant could be monitored and alerts provided as necessary based on temperatures and humidity.