@BernardLunn you are right about the need for oracles in smart contract applications. This will be growing in importance.
While Supply Chain is not something I am well versed in. As for how data with real-timeness can effect Supply Chain look at Fractal Payments and consider the potential to do away with the 30/60/90 Net financing methods.
Each link in the supply chain could involve a fractal payment to it's suppliers. Consider a stacking fractal payment arrangements vertically across the supply chain.
So not only is a single payment from the ultimate end consumer to a retailer, broken up in real time and sent to various wholesale & distribution parties, but when a portion of that original payment is received by the wholesaler it could trigger a second round of fractal payments to the suppliers & manufacturers.. then a third round of fractal payments to raw material producers etc. all in near real time.
In such an arrangement one could map out a complex view of the supply network instead of just having just liner view of a supply chain.
All this real time data & payments can be plugged into ERP systems and who knows what could be automatable in the future?