Monday was Workers talking to external services + durable objects.
Tuesday was upgrades to workers and the toolkit to make it easer to develop full apps on them.
Wednesday (today) was Worker+Pages integration and front end development.
No announcements yet of any upgrades to the Worker Key Value store, wouldn't be surprised if they have a day of datastore type announcements - its the part of the "full stack" they haven't covered this week yet.
They have to climax on Friday with something big right?