First, I think it's a given that you're going to see sidewalks to all locations. Of course, this doesn't automatically translate into "walkable". My guess is that the central corridor, once you get past the bridge and leading up to the hospital, should be reasonably walkable. Given the size of the entire development, there's no way the whole thing is going to be. The buildings on the perimeter, such as the Starbuck's on the corner, the office buildings on the north side, and the anticipated hotel/daycare on the south side, are not going to be very walkable. I used a sepia filter on the portion of the site plan (image below) that I feel will be reasonably walkable.
(UPDATE: The site plan below is out of date and a newer one is available in the following post)