AMD announced their new dual chip fiji today. Not much is known yet but it's called the Radeon Pro Duo. It's capable of pulling 525 watts and will have a MSRP of $1500. AMD says it's "the world's first content creation platform aimed squarely at the VR developer." So I guess it's not targeting regular consumers with this. They also said it's "absolutely the most powerful graphics card in the world by far." http://www.gamespot.com/articles/amd-announces-absolutely-most-powerful-graphics-ca/1100-6435647/
Some people have gotten their Radeon Pro Duos a little early. It's two full Fury XT chips with 8GB of HBM memory. It also comes with a 3rd (assumed broken) Fiji chip which could probably be used as a key chain. At 16 TFLOPs this would be the fastest gaming card on the market although it's price really just limits it to developers and hardcore enthusiast. Maybe we'll see some benches soon.