If I recall when Vancouver tried to do this with Grandville St it killed the vib, increased crime and became an area of town where people didn't want to go.
I remember that. It became a really crappy place to be.
In order for these spaces to become successful they need to become an attraction onto themselves but to do that you first need an important ingredient: architecture and a sense of prominence.
Many of the European strips we obsess over are beautiful places with beautiful architecture, deep history and unique culture. They are the literal heart of a downtown core.
Government Street might be a popular thoroughfare when cruise ships unleash their legions of passengers but it's not a destination for Victorians. It is not representative of our city, neither does it have a great deal of history along the area that we'd like to create the pedestrian zone.