Perhaps the most popular of his generation...but greatest of all time?
Are you serious?
You seem to be confusing his popularity with acting ability...he was a cute, appealing kid, nothing more. And he pretty much played the same role in every movie he made...but then as he started getting older it was obvious the public were beginning to tire of the same old routine, with films such as Ritchie Rich.
He has done the occasional movie recently, but in rather small roles, and he has also done the odd bit of theatre.
It would be good to see him make it as a mature actor, but as time goes on I don't really see any evidence or hear any sort of buzz in the industry about him at all...which is never a good sign.