The world cup, in my opinion, is Wesley's greatest achievement by far since winning the tough Dubai Open two years ago when the then 14 years old boy bested out more than 30 Gms. Of course there was the Corus C but he was the top seeded there.
Nonetheless, Wesley will return home fully accomplished and deserves a hero's welcome making his legion of fans proud of the new found sports hero's dramatic run in world cup. Boy, he nearly sent Ivanchuk into premature retirement.
Notes posted on Susan Polgar's blog following Wesley So's defeat:
as I said before, Wesley has enormous natural talent. But unless he will improve his weaknesses and enhance his various areas of strength, he will have a hard time now that the elite players will seriously prepare when they play him.
Karjakin and Radjabov both faced similar problems in spite of their early success. They had to work hard to overcome "the wall". I do not want to go into details about his weaknesses in public for the obvious reason.
His success in the World Cup can be a both a good and bad thing. The good thing is he now knows that he can hold against the best of them. But the bad is he is no longer a "surprise" to the top players. So in order to consistently have success against top level opponents, he needs proper coaching and assistance.
Only Wesley can decide how far he wants to go in chess.