The first demo for Hatsune Miku V4X has been released! The demo features the song “Music Music” by Toa, first uploaded on August 27th, 2014, and features two of the six voicebanks available – Dark (used for chorus) and Soft. More info on Hatsune Miku V4X.
Additionally, the Hatsune Miku V4X official website receives an update today as in providing access to the Hatsune Miku V4X concept art. The full-resolution images can be downloaded via the first link provided at the その他 section located at the bottom of the official website.