I'm not talking about the ryzen 7 though, i'm talking about the ryzen 5 which is more to compete with the intel i5 and not i7.
If you got catch up with Ryzen 5 news, they don't defer that much from the Ryzen 7 apart from core and threads count. Take the Ryzen 5 with a pinch of salt. Don't think it will blow the kaby lake i5 out of the water. As I mentioned earlier, it's up to what you're doing with it. You can go read Macclipper preview on the Ryzen 5 performance.
Expect Ryzen 5 to run slower than i5 unlocked with decent overclock (4.7-4.8ghz i5-7600K) in 1080p gaming where cpu performance is more notable than gpu. In a more balanced system like 1440p with gtx 1070/1080 where both cpu and gpu is working hand in hand, Ryzen 5 should be only slightly slower than i5 in scenario like this.
However, if your pc will have other workload that uses multi cores and threads applications like streaming while playing games, video editing and rendering, 3D rendering, etc, Ryzen 5 6 core variants have no doubt will have the upper hand.
Whether the Ryzen is for you or not, it's up to you and your usage. Also, keep in mind that Ryzen is still not mature. Many games and softwares are not yet optimized for it. Will they be optimized by the developers or not, it's another story, though amd do state they are working hand in hand with multiple software developers to ensure they delivery the potential Ryzen could bring.
Take the Ryzen with a pinch of salt. Don't look too highly on it, yet don't underestimate it. The Ryzen vs Kaby series is almost the same throughout the the skus. It depends on what you wanna do with the rig, to decide which one you should choose.
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