We will be pushing a patch live tomorrow. Players will be returned to the title screen from their activities and then be required to log in to Destiny again after installing the patch.
I'm playing Destiny and I don't see anyone in the game world.
If you cannot see other players in the game world—in the Tower, in Crucible, or out in the wild—it may be due to your NAT settings. Please see the NAT settings guide for more information.