Even 15-20 years ago.
Some guys reshape the game - MJ was one of them, but there have been lots of others. Young kids see what they do, and start emulating them from a young age - by the time they're in college, they can do many of the "oh my god" moves of the previous generation, and are raising the game even further.
Curry is one of those transcendent talents. He's changing the game in the ways that MJ did. Kids are seeing him do what he does, and practicing longer hours on their outside shooting, their handle, etc. In 10 years, there will be more players that emulate his skill set, and the game will have changed (and changed rules) to accommodate that evolution.
Pete Maravich was one of those game changing players... and Curry would likely play circles around him.
And that is wholly apart from the overall level of talent/conditioning that increases generation to generation. The level of money available in the sport has dramatically increased the level of competition in the lower levels, which creates a higher caliber overall player. The sports science of training/conditioning/nutrition has even changed in that time - e.g. Gatorade only had one flavor when MJ was being drafted.