Worth mentioning that we're also about halfway on the average time for these big features to hit significant saturation, like with PhysX. It's pretty common for a GPU (and sometimes CPU/Chip set) to take 3-4 generations to trickle down enough through new products and used product sales to have decent enough depth/usage. At this point depending on how Apple is handling ray tracing, they might slow down the transition away from rasterized.