Broadwell-E is 5th Gen. However, the Broadwell-E version of the 5930k is only going to be slightly higher IPC vs. Haswell-E. It may OC a bit better and run higher memory frquencies due to 14nm shrink and other tweaks, but can't say for sure. Either way, for 4k gaming it's really no better than 5930k, maybe 1-2FPS at same frequency. No reason to wait if 4k is your only concern.