Damien,
You are correct - there is a plan to open a starbucks in the ground floor of the Marriott facing F Street. Although many renderings often depict such retailers without actual agreements in place, I am fairly certain that Strabucks will want the location at the doorstep of 400,000+ conventioneers.
The GAP, and other such retailers will not work until the downtown population greatly exceeds 20,000. There are benchmarks for the retail recruitment business, and most folks are noth going to drive past the GAP at their local mall to come to the one downtown. A retailer like Urban Outfitters is more likely, because of their underrepresentation in our market, but we are still a ways off. The first phase of downtown retail will be boutique driven - a store like accipiter or 10,000 villages is MUCH more likely than a Barnes & Noble.
This will take time, folks. It will come in waves - the first wave (which we are still riding) is entertainment and dining oriented. We are doing that pretty well and are fortunate to have generators like the state museums and the performing arts center to build upon. After a large residential boom (we still need another 1000 or so units on top of the 2600 coming), other uses will start emerging. There are catalysts that some communities use to jump start retial growth - incentives, rent abatement, etc. - but those are largely unavialable right now. For a ten-year horizon that may be a good thing, since what we do get will largely be organic and market-driven.
The recent announcements of companies like Cherokee and Stewart are noteworthy. DT Raleigh is struggling to brand itself nationally - the one area most folks can agree upon is innovation. Such companies help to legitimize that brand, which is the promise of an experience for visitors and patrons to downtown.