Never a loss! I think we need to plan this now for when we have those buildings in 20 years and as far as I can find urban planners in the city haven't really considered it much. To me as a citizen living and working downtown this makes more sense to me than spending on transit to bring more business downtown.
Another great example is Toronto's Path system
http://www1.toronto.ca/wps/portal/co...0071d60f89RCRD