Just kidding on the "exclusive". But yes, 10-digit dialing is here now (give it a try), and by March 12, 2011, will be mandatory for all calls from the 705 area code (911 excluded). And a new area code 249 will be added in as well because we're out of 705's.
What does all this mean? Well, it will take longer to call Jenny. And an extra one or two seconds of your life to make the call. But hey, you'll be getting more exercise punching those numbers in.