Rated Battlegrounds will revolutionize the Player vs. Player side of World of Warcraft
Blizzard employees have stated in plain terms that
going forward PvP is going to be balanced around Rated Battlegrounds.
Arena players may hate it, but they're painting by the numbers here;
most people don't participate in Arenas and don't like them so Blizzard
is betting big on Rated Battlegrounds in Cataclysm.