Good concept. Although I'm a bit divided: I see this photograph better without the interior around. Meaning: I think that in a studio, without anything around, this would be much more standing out. This doesn't take away the fact that I'm curious how you did the hat-floating-thing.
Nice concept and implementation of it, though it looks like the hat is intended to be over the OOF item in the foreground. (A coat and scarf?) Could probably use a bit of a boost in post processing, though. Level, curves, a little more saturation and contrast. Just a modest amount of those could crank this up a notch or two.