It will not be a business concept described on paper, but a functional business with legal status in your particular governmental jurisdiction, developed within your available resources whatever they are, and challenged to generate revenue.
One of the greatest benefits of this specialization is the business development environment provided by the population of learners. At the point of the capstone course your thousands of fellow learners become consultants capable of refining and adding value to your business concept, they may also be potential customers or at the very least allow you to observe the likely reactions from potential customers.
With the experience of launching this startup, and the execution capabilities and confidence gain from that experience it is our desire that you repeat the process and launch another startup or a bigger version of this startup. Hopefully going on to launch another, and another, and another, evoking another cliché, 'practice will make perfect'.