It is never too late to innovate and do good in the world of technology and the internet of things. This What is next part of the course is there just to inspire you and give you ideas of how far you can go with the skills you learned, and keep in mind that Arduino is used beyond prototyping purposes.
The technology is there, innovate in how it is used & connected.
Don't hesitate to reach out if you need help or support.
Good Luck & Thanks