Now I know you want to use 1080p in order to get differences between CPUs and not be GPU limited. The problem is, those differences are therefore artificially inflated compared to some enthusiast gamers' hardware.
It'd be nice to have one middle-of-the-road (in terms of GPU/CPU-boundness) game benchmarked in 1440p and 4k, too, as a sort of sanity check. If the differences diminish to rounding error territory, people looking to game in those resolutions with good settings might be better off getting a "good enough" CPU and putting all extra money towards the GPU.
Not only that, if there actually *was* a distinct advangage to getting the best IPC Intel mainstream processor for high-res, high-settings gaming, finding that out would be interesting.