This is likely using smaller sized NAND, possibly even TLC NAND and those are all fairly new. Might drop a bit over the next year, but probably not significantly. We probably won't see a 512MB card for 1 1/2 to 2 years is my guess, and by that time we'll all want them in CFast cards since the new top end cameras are going to start to have that interface. That's all speculation on my side, but at that top end of capacity, you need to go through another whole generation of NAND shrinkage before they really can boost that capacity any further, and it's starting to slow down a bit as they get down to smaller and smaller processes. They're actually basically at the leading edge of node size, and as they get smaller and smaller there are more and more concerns with longevity and read accuracy.