He goes down as a top 10 player of all time, probably at least top 6 or 7; in the process helping to put the ring argument in perspective as he has already changed the dynamic of what the alpha/star player is, from being first and foremost a volume scorer to an all around team player who can play/defend 1-5, which has also helped bring about the "small ball" or "positionless" era (even though Magic and Bird did it already Jordan came along after them and made it all about the star player being predominantly a score first player more than anything).
He'll eventually go on to become a billionaire and part owner of an NBA team, most likely the Cavs; while, ironically, also being remembered as the guy who helped put the power in the players' hands more so than any athlete in any sport before him has ever done.
He also won't really be compared to Jordan in retirement, which is good for the game. After Jordan all the great players modelled their game after him and so were compared to him. Lebron is the first player since Jordan with a high enough profile, while also being good enough and different enough as a player to be able to have his own legacy independent of Jordan's. And Steph Curry is already the next in line good enough with a completely different skill set from Lebron to have the potential to be remembered completely independently from Lebron as an all-time great also. Good times ahead for the NBA, America's "Beautiful Game", 15-20 years from now I wouldn't be suprised if it's 2nd in the world only to soccer.