Okay, so while starting a Blood Elf Warrior with the latest patch, I discovered something:
Stand extremely far away from a kill-able NPC / out of melee range (or perhaps even a player,) just far enough away to target. Now you will press the auto-attack button, you will enter combat regardless of how far away you are.
This would be extremely useful if you built up a large amount of runic power or rage, and did not want it to go down while you were AFK for a bio break or something of the sort.
Yup.
That's it.
Merry Shattering to you.