SteemPower is a portion of your reward paid as STOCK in the company similar to like Microsoft and Google offers to their employees
Agree conceptually but since there is an actual Steemit company (which has developed and continues to develop the software), it is important to make the distinction that this is not STOCK in the company. It functions economically much like STOCK in the blockchain itself. Of course it isn't literally that either, but it is a useful analogy.