It's hard for me to consider Steph Curry a superstar when every at USA and FIBA camps considered Davis the clear best player on that team. Not saying Davis is a superstar yet, but shouldn't a superstar be far and away the best player on a team filled with non superstars.
Also, I think Love has benefitted a lot more from that criteria than the others because he has been on such a bad team that basically resolves around him. His defense is well below average, and apparently his leadership skills aren't anything to write home about either. The one thing that I think keeps him on the verge is his passing ability, but I don't believe he's a more completer basketball player than a guy like Marc Gasol, who has never been in superstar conversations.
IMO, the only 3 superstars currently are Lebron, Durant, and Paul. They all possess the on court skills, leadership skills, and intangibles that clearly separate them from the other stars of the NBA.
Davis is not far behind. With the advancements in his game that we have already seen in FIBA and preseason, and a winning season; I don't have much doubt that he will be considered a superstar by most after the season