I think he is fairly advanced for his age. But as others have already mentioned, this is not necessarily a prediction of anything for the future. My son was very advanced from a very early age, but my daughter had been somewhat a late bloomer compared to brother in the first few years, but now at 9 she is more advanced than her brother was at the same age.
I'd just follow the child's lead and try to give him the right condition for him to keep developing, identify and support his interest, and yes, give him a lot of free time/unstructured time especially at this age, let him develop his curiosity and creativity.
