If you wish to dual spec between holy/disc and shadow in cataclysm you are going to have to take 2 sets of gear:
DPS cloth: Int, Sta, Hit, Haste, Crit, Mastery (mage, warlock, Shadow priest)
Healing cloth: Int, Sta, Spirit, Haste, Crit, Mastery (Holy and Disc priest)
Whereas those shamans/druids who wish to go balance/resto or elemental/resto will only have to pick up one set for both specs
Spellpower leather: Int, Sta, Spirit, Haste, Crit, Mastery (Resto, Balance druid)
Spellpower mail: Int, Sta, Spirit, Haste, Crit, Mastery (Resto, Elemental shaman)
Does this seem like priests getting shafted once more to anyone else?