Nobody can say that. And its very vague. You can play the games, but it depends on how well playable they are, at what level of settings, your resolution, what fps you want to achieve, what type of games (fast online shooter needs higher fps than slow high quality offline role playing games) and what the game developers are doing in the future.
You can play games with single GTX 970 maybe 5 years long, which means at least 30 fps with low settings (or medium, depends on the game) at a resolution of 1920 * 1080 pixels or lower for really high demanding games.
Is that answer enough? Because nobody can see the future.