With the recent documentation it looks like Salesforce DX is leveraging the main business org to function. This is a big departure from registering for free users for developer orgs (we don't have full Salesforce users for all of our developers since these licenses are very expensive).
Their documentation specifies that you must create standard users for team members to leverage scratch orgs (a huge part of DX). Does anyone that was a part of the pilot know if this is actually the case?