"... Launch 2H 2017 ... "
In other words, probably had very little to do with an upcoming Mac Pro. Curious that the shipping site has Dracrays listed as "Fiji" listed.
http://digiworthy.com/2016/10/20/amd-dracarys-vega-10-on-zauba/
2H 2017 and shipping in near future doesn't make much sense. Dracrays perhaps being a new class of cards rather than a specific one.
An immediate term, Fiji model with Optane (Xpoint) like SSD would make sense to ship in near future while wait another year for a Vega refresh. The SSD is jacking the price sky high and an integrated "faster storage tier" Optane like device would do that.
None of this inside the thermal envelope of a likely Mac Pro update...... so way out, deep in the swamp in terms of relevancy. Fire breathing dragon is likely an accurate assessment of the TDP on this thing.