No, I don't think that's a good characterization. Sure, there's been improvements to the computational performance. But the big deal (to me at least) is the u

No, I don't think that's a good characterization. Sure, there's been improvements to the computational performance. But the big deal (to me at least) is the unified memory model between the GPUs and the Xeon host processors. This makes a lot of things easier to code for on a single system, and it makes multi-system applications easier to scale. This is because you're streaming data in over the network (10G Ethernet) and then the GPUs can operate on it without an extra copy step. The copy step also implies more management and shuffling around of the data you're operating on.