So far they were discussing Nyzule Isle gear and it looks like maybe God gear from what I saw in the screen shot on twitter so I would make a good assumption anything that was end game dropped will be eventually augmentable (with the exception of AF pieces and some select things they wouldn't beable to allow augmenting of due to the unbalancing of gear)
I do look forward to this though Im all excited to see what the turn out is on some of these things