Here's a quick overview:
Interestingly, there's also a mention of "Radeon Vega", meaning the cards may use a numberless name like the Radeon R9 Fury series did.8x capacity per stack: meaning the card can offer 8x the capacity per HBM2 stack as the HBM-based Radeon R9 Fury series.
2x bandwidth per pin: HBM2 offers twice as much bandwidth as HBM
High Bandwidth Cache: ?
512TB Virtual Address Space: ?
4x power efficiency: presumable vis-a-vis the Fiji generation?
2x peak throughput per clock
Next Generation Compute (NCN) Engine
Next Generation Pixel Engine
Draw Stream Binning Rasterizer: ?
Rapid Packed Math: ?
Primitive Shaders
Via: TPU