I agree...would never leave my house in my PJ's. I'm in grad school and more and more kids are showing up to class in pajamas and slippers. I'm always a little surprised, but I guess things are moving that way.
My only PJ exception is (OF COURSE) when we vacation at WDW. My daughters and I have a little ritual. Every night after we have showered and are in our PJ's and slippers, we go down to our hotel lobby (or food court) and get a little night time treat. The girls get a BIG hit out of this, because obviously at home they never get to go out in their PJ's and this is one of those special vacation-only things we do to make it a little more special.