Well, come Cataclysm – no more emblems. You’ll be getting arena like points one set for low tier pve, high tier pve and the equivalent two for pvp.
So you’ll have a weekly cap that you can earn.
“To explain the reasoning for the weekly cap on points for the higher tiers, this is to provide flexibility in how players choose to earn the points without feeling like they have to do all of the content as often as it is available. If your Valor income from raiding is sufficient, you may not feel the need to run Dungeon Finder every night, or perhaps even at all.”
It’s what the raiders wanted – a reason to be excused from the daily dungeons. Interesting change.
More info at wow.com: