With a lot of items becoming bound nowadays it's hard to show off your hard earned kit except via screenshots which can be a pain.
THerefore, it would be nice if you could click on another player and examine them - i.e. see what items they have equipped and what they are wearing in all their slots.
For privacy sake, perhaps make it so you can disable this if you don't want people peeking at your items.
Anyway - I think that would be cool.
Cheers,
Garth