I watched the presentation. The most striking feature is that the avatar is created automatically from profile photos. It's probably possible to game the system, but the default is an avatar that looks like the real person. Compare this with Second Life avatars, if you've been there 10 years ago: they defaulted to some different 20-25 yo person. Not that the avatar of the speaker didn't look younger than she was, but it was still her.<p>I think this has to do with making Spaces a "comfortable place for everyone", where you recognize your friends and don't mingle with strangers. It means it's an extension of the real world and actually many of the Spaces in the video were overlays over the real world. It goes more in the direction of augmented reality than virtual reality.<p>They also presented some interesting stuff in the areas of object recognition, 2D pics to 3D scene transformations, interacting with objects in those scenes, simultaneous localization and mapping (setting virtual objects precisely at a position). Technologically they were the most interesting announcements, in my opinion.<p>The news about Messenger were somewhat underwhelming: smart replies, M suggestions, game challenges, chat extensions. Interesting but not ground breaking. I'm still waiting for end to end encryption to chatbots (encryption is granted on the network but FB's servers see the messages in clear) and for WhatsApp bots.