Most of those offices and condos, if they materialize at all, will probably be located north of Hwy 7 and served by the VCC station.
There is a limited amount of space between Hwy 7 and 407, and part of it is occupied by IKEA and its parking lot.
Tsk Tsk. You assume that once a building is built, it's going to stay there. However, Vaughan's official plan for the VMC includes total rezoning of lands and destruction of buildings occupied by Lowe's, IKEA, AMC, and others by 2039. For about a year already, the city has posted notice on a large sign at Toromont stating that Toromont's property is slated to be rezoned as "Corporate Centre" (might this change their property tax rate?). A couple of years ago, an article appeared in the Toronto Star stating that Toromont would have moved out by June 2010 to a spot south of Barrie that was in contention because its proposed site is on the Greenbelt. Obviously that didn't materialize but it is also obvious that the city continues to put pressure on Toromont to vacate.
I have worked at an office in that area since 1995. Wal-Mart, Futureshop, Lowe's, AMC, IKEA were built after the City of Vaughen cemented its plan to design that whole area to be the Vaughan Corporate (now Metropolitan) Centre in 2001. Well, Wal-Mart might have been built just before 2001, but the City had been already in the early '90s focusing on this area as the "new downtown". So none of these businesses can say they weren't warned that they had limited lifetime.
I figure that what the City has been doing can be paraphrased as (note this is my own hypothesis): "Look, we have empty property that we want to utilize at least a bit so that we can get more property tax revenue. We're waiting for developers to show up who are willing to build high density buildings; it looks like that'll take a couple of decades before that starts to materialize. So for the time being, let's allow big box stores, but warning them that they won't be allowed to stay there forever. In fact, we hope that we, the City, won't even have to legally force them to leave, but rather market forces should drive up the cost of land (and thus property taxes) to the point where these box stores will not be able to survive if they stay."