I'll copy and paste the exact same thing I posted in a thread discussing the exact same topic a week ago.

This will literally never ever happen so I don't know why people keep bringing it up.

Caps are in place for a reason, because without them people will chain run 4-mans until they become physically ill and will be geared out in full i120 two weeks into the patch. Then they've got 5 and a half months until a new raid tier comes out with no character progression to work towards. Use your imagine to figure out what this will do to retention rates.

Caps stink but they're here to stay unless Square Enix can figure out the magic secret to developing new raid tiers every three weeks. Considering not even the mighty Blizzard can do this, I think it's safe to say the current content release schedule will be maintained.