In terms of gaming, it depends which games. GamersNexis had some great examples, mainly Watchdogs2 and GTA5, where an i7 performed much better, and i5's can bottleneck results using a card like a gtx 1080, especially at resolutions over 1080p.

Steve Gibson is a reliable source, he’s a security expert who hosts a Show called “Security Now” with Leo Laporte.