Technical Game Designer Chadd "Celestalon" Nervig has been tweeting recently about the changes to gems coming in Warlords. We already knew via his previous tweets that gem sockets on gear are very likely to appear by random bonus in the upcoming expansion, but what he's clarified today is that primary stats, so strength, intellect and agility, will no longer be gem-able:
@Ady_Mx There are no more primary stat gems. Only secondary stat gems.- Celestalon (@Celestalon) December 29, 2013
And while Celestalon hasn't confirmed this, it seems likely that primary stat enchants offering +intellect, +strength or +agility might also disappear, resulting in necessary changes for some profession bonuses. With the new gear system, secondary stat enchants, which are already the vast majority of enchants, make the most sense. As far as tertiaries go, he does mention that movement speed may remain on boots, but no further information was offered.