Have you ever been to NYC?
Imagine all the staircases in the NYC subway system. Imagine all those steps. Imagine if each step could generate electricity each time someone steps on it. Imagine how much energy that is.
The floors by Energy Floor could be slightly altered for stairs. Instead of powering the lights in the floor, the energy generated could go to the grid.
All the staircases in skyscrapers could be converted to generate electricity, sending the electricity right into the building.
The staircases  (and floors) in airports, train stations, malls could be used to generate electricity.
I wonder if Energy Floor has thought of this yet.