Definitely interesting. There were a couple large, vacant offices on other floors that 201 Portage had been using as similar conference spaces.
As for the changes, I am not sure if anyone else has noticed but three established food trucks have taken up residence in the 201 Portage driveway. One of them confirmed they are there for the whole season. The other interesting aspect is one does pizza which would seem to overlap with one of the food court tenants. All that seems to suggest something is likely to start happening sooner than later.
In terms of "variety" keep in mind there is likely the vacant unit between the esclators and the sushi place. It used to run a Starbucks like coffee place back before Starbucks was in the building. Between the sushi, muffins, the vacant unit, the smokes and snacks place and the announced location it has decent variety and has cut out the majority of the food court.
Link to Mercatino. Seems they operate three locations in Calgary.