It still feels like 3DS is in it's infancy because 3DS' library is only comparable to the NDS at age 2. The 3DS is now a full 3 years (Which usually means halfway till next-gen) and all conventional thought says that the next Nintendo Handheld and next Mario Kart to grace it's presence will likely be out and about by Holiday 2017 or 2018 Spring/Summer at the latest.