Lots in Seattle too; several centres are ahead of Toronto in this; though, we have been doing it for a while now, but at a very small scale; perhaps a dozen spots across the City; a few more if you count traffic islands.
But this will shift.
The entire Portlands and Lake Shore Blvd East public realm is based on alternate ground covers (alternate to sod/bare soil) with a heavy focus on native plants and perennials.
But it's working its way in smaller streetscape projects as well.
Oh don’t worry, I’m sure Toronto Hydro or Enbridge will be by soon to first randomly spraypaint the sidewalk and concrete, then let it sit for six months, before returning to cut and excavate and cover over with asphalt.