The 4760K is still a strong chip, Haswell still has more to give, especially once you overclock... So can last for a while longer yet.
With that said... Anandtech has a "Best CPU's for Gaming" thingy today.
https://www.anandtech.com/show/9793/best-cpus
Even they are recommending the Ryzen 2600 and 2700 for their respective price brackets.
April to June is when they are expecting Ryzen 3rd gen. - Most people have hedged their bets around that period.
Just a shame that Ryzen 3rd gen isn't coming notebooks as a 7nm chip, but rather a 12nm one, so there is no inclination to upgrade for me yet!
--::{PC Gaming Master Race}::--