On the Laravel News site there's a new article posted about a big change coming to the "app" folder in Laravel-based applications (hint: it's moving towards more simple, not more complex).

As we are getting closer to the launch of Laravel 5.3 new features, seem to come out almost daily. The latest is a change to the “App” folder and in a move to simplify it, the Events, Jobs, Listeners, and Policies folders are now gone.

You can still get them back if you "artisan make" something that fits in one of these four folders but, as they're not really "required" by default they were removed to do some de-cluttering. If you want to find out more about what else is coming/changing in Laravel 5.3, check out this other article also on the Laravel News site.