Personally, I'm not that much impressed, simply because of the timing. A bit late and everything they got, to -in some cases- barely top NVIDIA's offering. This is all over again when AMD cards with GDDR5 memory were competing head-to-head with NVIDIA cards using GDDR3. They applied a new memory technology to minimize bottlenecks in fetching data, but without a properly designed architecture to make full use of it.
Pascal, on the other hand, is designed with HBM memory in mind from the beginning, trying to exploit its full potential. I'm not saying to wait a whole year for it; just that that's the way a new technology must be implented: designing everything else around it and not just pasting it like a cheap patch. Improvising and attaching a turbine to a car won't nearly make good use of it due to the limitations of the car; what you're looking to is a plane, with the according design to make full use of the turbine. The car with the turbine may reach 150 mph quick and safely, but not much more speed due to the design of the car, without losing control of it -loss of traction at higher speeds; while you could achieve 700 mph with the same turbine on a fighter jet.
