Out of the box with minimal configuration this theme would be great for any other one-off event you might have that has speakers and sponsors. It wouldn’t be that difficult to create suitable custom post types and get it up and running in a hurry.
This theme would also be a good starting point for a brochure site where a client wouldn’t be adding or removing pages on their own. With a moderate amount of work a footer could be added and content layouts modified to suit client needs.
If you’re feeling ambitious a great project would be to make the theme work with dynamic WordPress menus. You might take inspiration from the Menu API Plugin or tinker around on your own. To make the theme even more client-friendly you could try utilizing the Customizer API to make routes and menus more accessible for those with weaker skills.