Does Casual Attire Fly at the Airport?

Recently, Fairly Legal star Sarah Shahi was seen arriving at a Vancouver airport wearing an outfit that resembled very comfy and cozy PJ’s. In recent years, this uber casual look has been THE wardrobe for traveling, but don’t we all remember a time when our parents would get the whole family dolled up to go to the airport en route to a relaxing and casual family vacation? While it’s acceptable to be comfortable while traveling, have we taken it too far? Or were our parents the ones that took it too far in dressing up?