Nobel sciences prizes no, peace prizes DEFINITELY. Cannes for sure. Awards exist to stroke egos, generally of sad people who feel incomplete.
The Cannes jury generally does a good job of predicting what will last. Fahrenheit 9/11 was an unfortunate exception. And the Oscars used to (although I could pick a film I like more for most every year of their history). The Oscars have traditionally done a good job of educating the American public about movies.