The office boom, when?

Someone please educate this ignoramus here.. The downtown residential boom is simply amazing, but I can never stop thinking, will more iconic office skyscrapers follow? Afterall, these people need places to work don't they? With downtown becoming THE spot to do business in the midwest, when will companies realize downtown Chicago is the place to be and move their offices there? Forget the residential, culture, and entertainment.. bring in more companies! What are the current vacancy rates? If they're pretty high, then I understand we'll have to wait before any construction, but seriously.. bring on the employment, expand the skyline south and west (instead of crowding everything around Aon!) Also, what are the chances of having a nice hotel skyline around McCormick place when it's done with its expansion? I find it a bit silly that people stay at far away hotels for these conventions and get bused to the facility. One Hyatt Regency isn't enough, there should be 5 or 6 hotels around McCormick. Just some random thoughts from another random Chicago lover..>