AirBNB regulations are coming in the fall, which will require owners to be on the premises when renting out the property, and banning short-term rentals for more than 90 days out of the year. IMO this is bad news for Downtown, since having the owner of a condo in it while you rent it for a week or whatever sounds... questionable.
Could cause a spike in Downtown condo supply, which is already taking around 4 months on average to sell. Some condo corporations also allow short term rentals because tenants aren't choosing the building, and this way their condo fee collection isn't jeopardized.
I don't know. It seems like trading one problem (loud neighbours sometimes) for a bunch of new ones.