I agree with your caution. Again with my example, if you look at Xerox, Apple, Microsoft, IBM, and a plethora of companies that have tried to make money selling

I agree with your caution. Again with my example, if you look at Xerox, Apple, Microsoft, IBM, and a plethora of companies that have tried to make money selling PC hardware, you see that although the mouse and GUI have obviously "won," actually making money from them has been a challenge.