Ascended - Bind on upgrade only
Well in theory they promised to add a kind of ascend gear to all kind of gameplay. After all top stats gear should always be available many ways.
If we can believe that promise considering it comes from Anet or not is the problem really.
Gear Grind: Confirmed – Searching New MMO: Found – Changing MMO: Waiting Launch
Another advantage to making stuff tradeable: It means that, even if the item is a RNG drop, every run you make is still some measurable progress towards acquiring the item.
With the item being bind on pickup and RNG, if the run doesn’t drop the item, then the run hasn’t made you any progress. At most you make it to a higher level of FOTM, and you have your drop rate go up by an unknown amount.