Berlin is the promised destination that Lille offered to Elliot.
Elliot thought, maybe at the moment he reached Berlin, his "journey" would indeed come to an end.
Although he liked to rant online, advocating for rebellion, revolutions, and the like, he also had a deep admiration for greatness in his heart.
Take the great Berlin, for instance: When a person stands in the sky-high ecological garden, appreciating the waterfall flowing down from the heavens, drones orderly flying in the sky, interacting amicably with tanks, armored vehicles, mecha, and cyber warriors, he was convinced that this was a mighty alliance, this was the alliance he dreamed of—
One could even say, this is the future people desire: A human society supported by advanced technology and orderly industrial production, with man-made structures proudly standing in the world, different from the uncanny workmanship of nature.
