Fairfax County Planning Commissioner Walter Alcorn proposed major deviations from the Tysons 40 year plan. According to today's Washington Post, "Alcorn is suggesting planning for the next 20 years only. Growth would be capped at 84 million square feet, almost double the size of Tysons today but less than the 113 million square feet proposed in the 40-year plan."
Alcorn's proposal is aimed at addressing a major concern of area residents. Residents "worry that the proposed land-use plan would produce massive growth that would cripple the road network." Also it's very difficult to know exactly how things will look 40 years down the road.