I think the "organic economic anchor" point is different from the "identity, marketable, parking, policy angle." I see those as more ground level band aid solutions that will definitely have a positive impact on DT at street level that make suburbanites feel good about vibrancy. However, the "organic economic anchor" is something that sustains, generates growth, employment long term and creates a neighborhood vibe of its own. For example, take a look at Seattle's waterfront. Its not pristine and completely lined with luxury condos and green space. Its littered with thousands of people and activity generated from ferry terminals, port terminals, fisheries, etc. All that activity in a compact setting, creates viable business opportunities for attractions like Pike Place and support businesses like restaurants and retail. That activity, then creates a unique urban experience where people want to come visit, which then brings hotels into the mix. At that point, you now have people willing to pay hundreds of thousands to live in infill luxury housing to be in the middle of the vibrant atmosphere.
We basically had the same logistics based organic economic model in our downtown. We removed the industry, maritime businesses and railroad and still wonder why the DT environment sucks for places (retail, residential, hotel, tourism, etc.) that are really a byproduct of the anchor system we took out. So, from a bird's eye view, let's try and address the basic premises of a built-in economic anchor, based on the physical and locational characteristics of the context (environment) already in place. With this in mind, something like a new convention center or amusement park may not be the one trick economic pony some make it out them out to be. It just may be giving up some waterfront or land to expand or attract a maritime related or blue collar oriented business instead of a riverfront park, aquarium or floating ship museum. On the flip side, it could also mean utilizing existing assets like Baptist or Shands as anchors and selling DT as an urban medical district instead of throwing away incentives on financial companies that will most likely merge, reduce office space and lay workers off as technology advances.