For the first time in forever (see what I did?), you can now travel from a WDW Theme park to Disney Springs.
Disney just announced that after 4:00 pm, there will be Disney bus transport from the 4 WDW theme parks to Disney Springs. This will allow guests from the theme parks to go to Disney Springs for shopping, dining, etc.
Notice that I said the transportation is FROM the theme parks to Disney Springs. This is a one-way service. You still can't go to the theme parks FROM Disney Springs.