The Greenskin has exciting news about tanks in PvP in Warhammer Online: they will have a taunt that actually does something. In this case it reduces the damage that the taunted character does to anyone else but the taunter by 50% for 30 seconds. The Greenskin muses probably correctly that in the hectic of PvP many people won't even notice they have been taunted, much less change their target because of it. But at least the tank did something useful to protect the healer or mage on his team.
Now can I please have that functionality for my World of Warcraft tank?
Right now in WoW the arena and battlegrounds are marked with big signs saying "tanks must stay out". Their taunt and other aggro management abilities simply do nothing at all, and if they PvP anyway, they'll find that none of the PvP rewards is of any use for a tank. The best thing a warrior can do if he wants to PvP is to change to arms / fury, and collect a good dps plate set plus weapon. But as a "tank" he currently isn't welcome in PvP in WoW. I'm happy to see WAR is handling that better.