First up was one of the most widely requested features -- the ability to set up individual profiles for different family members, complete with their own queues and recommendations. The profiles can be set up on device or on the Netflix site, with toggles for a preference to its Just for Kids menu UI, as well as asking a bit about your preferred movies to seed initial recommendations.
Being single I don't have much use for this but it is cool. No doubt people will also use this to make sharing an account with friends and family not in the same household easier. I don't see any indication of when they'll roll it out or what devices will have it.