that has helped me immensely in ORD when using American Connection flights. I can see a delay in the works or a cancellation in the making well in advance. Since I hardly ever have a delay on AS let alone a cancel, Im not sure how it would help me much other than to see where the plane has been all day. I once had an AE flight on a plane that went DAY-ORD-MHT-ORD-LEX-ORD-ROC-ORD before it got to my ORD-CWA flight. It was kind of neat tracking it all the way. It was delayed almost 2 hours on the first leg. By the time it got to my flight it was 8 minutes early to the gate at ORD. Granted the padding they put into some of these short hops certainly helps. Some of these flights take literally less than 30 minutes but are scheduled as 1 hr or 1.25 hr flights
This is a nice feature, although it's not always accurate with United due to equipment swaps/placeholding, particularly at hubs. I've had several cases with UX where the incoming flight isn't scheduled to land until close to or even after mine. Closer to departure, the correct aircraft were swapped in.