There are monopoly laws
Nothing can take over everything
This. OP, I'd suggest taking economics before assuming something like this is possible.
For control of such a large portion of the goods market, our economies would be on a rapid downfall into major recession long before the "king company" came into full monopoly. There's this thing called the distribution of wealth, and it's kinda important to actually have a distribution of wealth.
Now, out of those companies, which do I see being most successful in the long run? Either Google or Apple.