I imagine the walkability of TOD areas will always be tied to what was there before. Developers don't seem to have the imagination or the will to build a complete community from scratch.
Here's are examples of TOD proposed in Ottawa. The first is at Blair station, around and partially replacing an existing community mall, the Gloucester Centre (370,000 square feet). Anchors are Loblaws, Wal-Mart, Rexall, a large restaurant in Big Rigs, Bulk Barn and a few smaller shops and services. It also includes a few stand alone retail in the parking lot. The first tower proposed is the one that includes a skywalk to Blair station.
In the adjacent parking lot, we have RioCan's Silver City that includes Scotiabank Theatre, Chapters, a few chain restaurants and a Fit4Less. They've torn down a strip mall for the first three towers (one completed and one u/c), along the Queensway.
Here are some views that include both developments as planned.
Gloucester Centre (with some Silver City)
Silver City
Across the street from these are the offices of CSIS and CSEC.