Yeah, I have to admit -- I doubt I'd wear it 8 hours a day. Of course it is -- with music that was recorded for reproduction on speakers (I.E. most of it). The only exception would be binaurally recorded music, and that would have a more natural soundstage on headphones (vs. speakers), but that's the exception, not the rule.
For most of the music I listen to, soundstage is nonexistant -- neither headphone nor speaker -- so I don't care. Most of the time.