AMD at Computex just shared the word that is it announcing 7nm Radeon RX Vega the first model will be a deep-learning SKU, ther Radeon Instinct 7nm 32 GB HBM2, 

7nm is good for power consumption mentioned AMD in the demo, the GPU is already in sampling stage. Specs have not been mentioned we expect this die-shrink would get the same 64 CUs / 4096 shader processors as in Vega 10 (the current one), who knows for sure really. 

“Thanks to additional improvements at both the transistor and process levels, the 7LP technology is exceeding initial performance targets and expected to deliver greater than 40 percent more processing power and twice the area scaling than the previous 14nm FinFET technology,” was stated by GlobalFoundries back in last year, mid-June.

World's first demo of 7nm Vega with 32GB HBM2 on Cinema 4D was shown during the event. AMD will bring 7nm Vega towards gaming as well, no timeframe is mentioned though.