There was an article in Crains this week about how the office market was overbuilt as far back as the 80s and it never reached full [[or nearly full) occupancy metro wide. The reason given was GM's purchase of EDS and the perceived need for millions of square feet of additional office space.

So barring a large corporation wanting a trophy tower for it's headquarters, i really don't see Detroit constructing a skyline altering tower for many decades. I think the best the city might see is a condo/apartment tower maybe in the 20-25 story range tops. And with the Book and Stott towers eventually [[hopefully) being rehabbed into residential, i think anything more than a midrise will be uneconomical.