A Biopunk world of elves. It is lush and green, with a lot of water but less water coverage than Earth.
Highly developed, overpopulated (to the point of law-enforced eugenics), based on biotechnologies — living buildings, reforming by the mental command of their owners, semi-sentient plant-based tech, implants as accessories, weapons or everyday needed appliances, and all kinds of body modifications. With a planetary government and Social Importance system which gives each elf a certain flexible amount of SIPs (Social Importance Points) that are equal to the number of votes a person has. With Hives — social groups with members constantly connected on a mental level, forming hive minds that (usually) (should) still keep each person an individual. 

Also, there are morphs — an elven subrace that can change their physical sex as they wish. They look pretty androgynous in both male and female forms. The change happens within minutes; some can do it faster, some slower.