Not sure, but some gamers are youtubers and they need to process videos. What about having an extra core or two for handling recording and playing live? Those cost serious real time processing.
When I'm streaming, I let my GPU do the video capture and compression for me (Nvidia NVEnc). You can do this with ShadowPlay if you feel like hurting yourself, but Open Broadcaster Studio supports it too.
Extra cores might help with that, Intel Quicksync might be even better or some GPU based video encoding.
Quicksync is a marketing bullet point. Nobody sane uses this crap because quality is abysmal. Its bad for streamers (they usually run second PC just for stream compression), and bad for archiving video(quality again).