Civilization VI is going to bring some changes to the way the game is played compared to Civilization V. Cities and improvements will now take up multiple tiles. And to create improvements, workers have been replaced by builders.
A new video from Firaxis shows off some of the mechanics behind the new unit, including the instanteous creation of an improvement instead of having to wait numerous turns for completion. While this may a welcome change those of us who impatiently wait for upgrades, the drawback is that builders will only build three improvements before they disband. The video mentions "most builders," which means it is possible that some builders may have more charges, either via promotion or as a perk of a particular Civ.
If you are a veteran of the game, these videos are pretty informative about what you can expect when the game hits on October 21.
John Keefer posted a new article, Civilization VI video shows off the importance of the new Builders unit
hm... i think i might like that limited 'uses' per builder/worker thing! it has been sort of a problem in these games where i eventually have an army of idle workers doing nothing. but i'm also not a good player :D