The Changes to Emblems and PvP Points they have generated a lot of controversy. It took a later clarification And now Bornakk explains something about PvP weapons.
We just updated the original message with the following information:
In Cataclysm there will be two tiers of PvP weapons; The quality of the low tier weapons will be similar to the items in the most recent raid tier on normal difficulty and will cost Conquest Points The quality of the high-tier weapons will be equal to the items in the most recent raid tier on Heroic difficulty and will have minimum personal rating requirements, plus they will cost Conquest Points. All high stat PvP armor, including head and shoulder pieces, will only have an associated Conquest Point cost and will not have any rating requirements.
Basically, this means that the best PvP weapons will require you to perform well in rated Arenas and Battlegrounds but it will be possible to get weapons with Conquest Points only. This way, equipping yourself for PvP should be a bit easier and you won't need to equip any PvE at all.