"Our goal is not to create a gear treadmill," White wrote. "Our goal is to ensure we have a proper progression for players from exotic up to legendary without a massive jump in reward between the two." He went on to say that PvP will be unaffected, and that the new stuff will be "available in both PvE and WvW over time, and be made available through all sorts of content around the world including existing content."
The full statement is available via the GW2 forums.
[Thanks to Ring for the tip!]