I would like to see more, but, at least in the US, they are getting started on doing this.
I live in Texas and there are so many small towns that seemed to have forgotten trees exist outside of the trees planted in a private yard. I have only lived in Dallas as far as bigger cities go, but the trees are mostly located in the richer/older neighborhoods. Trees planted next to the curb and cared for by the city are almost non-existent.