Different if it's the style. Back in the day, you didn't go out, without one.
In the 50s, you'd feel stupid going out in public while wearing sneakers, shorts, and a red T-shirt with some pithy saying like "I'm with stupid" written across the back. :-) Now, I see kids showing up to interviews dressed like that.
Like I said, hopefully this trend will clean things up a bit in the office.