Whilst trying out the Salesforce lightning developer guide, I have noticed that it's not saying anything about adding a lightning component to a page.
At Dreamforce, I followed a couple of sessions about the lightning components. During these sessions, demo's were provided in which particular components where replacing, for instance a field on a page layout. Unfortunately, I was unable to follow a workshop for the lightning builder.
How do you replace a field on a page layout with a lightning component? Or does this needs to be done by the lightning builder for which we need to request access to?