Vacuum Bagging is promoted as a means of prolonging the shelf-life of your food, but that alone doesn't make it all that cost-effective compared to zipper bags or food wrap.
The exciting part happens when you drop that sealed package into a pot of boiling water, or into the microwave, and suddenly realize you have discovered an entirely new way to cook.
Professional chefs have used immersion cookers to either re-heat or cook pre-bagged entrees for years. Now you can shine in the same way, bringing a selection of prepared meals from your freezer to the table in just the way a fine dining establishment would.