Would QM be detectable in a all boson universe

If there was a universe with the same laws as this one, but there were only bosons in it, would QM 'do anything'?

Would there be any QM effects - such as an energy level (but that would require fermions..).

-
Yes. For instance, the wave-particle duality is valid for bosons as well. – Hunter Apr 5 '14 at 19:57