These Enterprise Zones, can be exciting news, if the local authorites get behind them and are managed successfully...
I live near to Northampton, and they have had the Waterside Enterprise Zone for about the last 3-4 years, and is publicised as the most successful zone in the country.
For example Carlsburg, Avon, Cosworth and Barclaycard have opened new offices in the area, the University of Northampton is building a new campus and a new railway station has been built. Along with a new Marina and skate park.
Northampton Alive - Regeneration projects
While the zone should definately benefit Luton and be a catalyst for new things, I am not sure how the airport will benefit directly. Other than maybe airport related offices opening in that area.