Ultimately we're just going to agree to disagree on this which happens a lot but I'll still try and explain my perspective.
First, while I think Curry these past two seasons is proving to be the greatest shooter the league has ever seen, I don't think he's really redefining the game the way you're terming it. He's the prototype player of the modern NBA, which relies of movement and reaction more than anything else. Curry is simply the perfect player for that style, but his emergence didn't create it.
As far as age goes, all I'll say is that when all is said and done you'll be able to look at essentially a decade span where LeBron was the best player in the league vs a stretch of, I don't know, 5 or 6 years where presumably Curry will be there. Now will people look at those 6 years as a reinvention of basketball like you're saying...maybe. I think that's a stretch and if Curry takes the throne from James long term, I'm still going to value LeBron's longevity. Something I think most other people not completely tied to one of those players will do as well.
