Only a little more than 4 months of this year have passed. You can't know who will be the best player over the course of the year.
This time in 2006 Ronaldinho was by far the best in the world, but in the second part of the season he was almost awful.
World Player of the year and the Ballon d'or are given to the best player in the last 12 months.
So even if these awards weren't WC biased, you still couldn't know who is the best in 2010.