The game will randomly put something along your projected path so you come upon an encounter of some kind. It is being used currently for the Twitch integration where viewers can spawn things in and create nasty/funny/beneficial events for the streamer who is playing. The idea is that a computer controlled manager can trigger similar events (probably not the funny silly kinds they do on Twitch) for the player to encounter.
Possible Examples:
You are biking along the road and come upon several bandits fighting with a horde of zombies. You can watch, join in to help/hinder the bandits....whatever
You go to grab the supply drop and the event manager could choose to either place bandits that arrived there just before you did, or bandits that arrive at the same time as you or bandits that arrive shortly after you do.
You arrive at your quest location to find it surrounded by a herd of zombies that must be cleared out before you can begin the quest.
You are in the middle of your quest and a band of bandits arrive to do the quest as well....
Wandering hordes somewhat fit this feature but they are on more of a timer and this would be randomly spawned and with a greater variety of scenarios if they are able to fully develop it as they were originally hoping. The good thing is that it will help the world feel fuller and more populated with zombies (and eventually roving bands of bandits) without actually having to increase the general population. They are simply random focused events that spawn nearby where you are likely to encounter them.
That is funny because of all of them the raft is the only one that is already finished and just waiting for other things to be completed,,,lol
