A standard closet has one of the following types of doors; bi-fold, sliding, or standard door(s). These doors make it hard to get into the closets as well as being in the way of storing items. Doors also inhibit the movement around the doors.
This closet was designed for more internal storage, but it uses up 18 square foot of floor in front of the closet that cannot be used for storage and or any thing else.
Installing Lockers in the same place where you would put a closet, it will hold more items as well as being able to organize your items or your kids.
A walk-in closet laid out right yields more and better quality storage as seen in the next 3 pictures.