I guess you gotta look at the demographics and crunch the numbers. How many new people moving into the city per year, current housing stock, new starts (in Hamilton's case almost entirely single family res).
If the numbers work, maybe there is market for a few hundred units? The current structure will have around 100 units, which should be achievable for the end of 09. At that point I think it will come down to re-evaluating the marketplace, and determining demand.
I really can't see anything happening that could warrant an 80 storey tower in the next 3 or 4 years, but hey who knows. A 30 storey tower seems more realistic.
Maybe he'll build a sort of "unofficial residence" for Mac students. I have friends at Mac who live downtown who I think would be more than happy to rent in a new building as opposed to some of the run down stuff they're stuck with at the moment.