When a Story (or whatever issue type) has Subtasks, the issue view page has the "Subtasks" section. There we can see all subtasks, and those that are resolved have a green checkmark at the beginning of the line. But is rather confusing to have a green check because the Resolution field itself is not showed, and it can be misleading if the resolution is something like "Won't Fix"...
It would therefore be very information for agile project managers to have the Resolution field displayed on each Subtask line.
See screenshot.