Imagining myself as a restaurant owner, I'm confused as to how this would integrate with my existing website. Does it replace it? How do people get to the mobile version?

I suspect you have plans to move to the desktop web, too -- seems like it'd be great for restaurant owners to have a one-stop shop for all of their website needs.

Restaurant websites are definitely all over the place in terms of quality and accessibility -- seems like a solid market. Best of luck.