Crafty_Angyl on MC Forums:

I don't know if this would be possible, but it could be useful. When someone in a survival situation is building up an army and they are adding armor, weapons, and augments when they can afford to do so it can get frustrating trying to remember who has which augments. So one thought is instead of having to open 20 inventories to find that one minion who does not yet have an apple you can now toggle on and off a little hovering item over their heads showing who has which augment installed.