The i5-8500 will rarely be the bottleneck.
There will still be some situations where a CPU bottleneck will happen if you want to get technical such as occasional stutters, CIV6 processing time, some MMO client load, and games like Starcraft 2 in larger battles.
The graphics card while good for light/medium gaming will be the bottleneck 95% of the time or higher (depending on the game).
So you'll want to tweak games accordingly and primarily run 1920x1080 or 2560x1440 (depending on how demanding the game is, and if you even have a high res monitor).
That CPU will hold up nicely over time though as games will continue to take advantage of more cores/threads and depend less on fewer, faster cores.