Obviously, this requires some speculation as to how the rest of LeBron's career plays out, but...
...so at this point, he's got two rings, two finals MVPs, four regular season MVPs, more than 20,000 points, etc. He's one of the better defenders in the league as well. It's possible he ends up the all-time leading scorer. He's got a good chance to match or exceed Kareem's MVP total. Quite a lot has to go right to be in position to win an NBA championship, but he probably ends up with more than two.
Given all that, what do you think his legacy ends up being as a player?
Excluding LeBron for the moment, I think MJ is clearly the GOAT. There's a tier right behind him that includes Magic, Bird, Russell, Wilt, and Kareem in some order. And right behind them are Duncan, Big O, Jerry West, Kobe, Shaq, Hakeem (again, in some order). In my view, LeBron at this point is squarely in with the third tier and knocking on the door of that tier behind MJ. In fact, barring some sort of catastrophic injury, I don't see how he doesn't get there.
What separates Jordan clearly from LeBron, besides the four rings, is that MJ was devastating well past his athletic prime. MJ's game evolved as his physical abilities did, so the guy who won a championship in 1998 played much differently from the guy who won his first in 1991, much less the guy who scored 37.5 PPG in 1987. Of course, LeBron could have a similar evolution...or his physical prime could simply last longer than most. If those scenarios play out, the MJ-LeBron debate could well become a legitimate one. Stay tuned.