Sega has detailed over at the official Miku Blog, the hairstyle customization feature and Survival Course in Hatsune Miku: Project Diva Future Tone for PlayStation 4 which is due on June 23 in Japan.
Details as promised:
One of the introduced game features is the hair customization feature, where players can freely apply hairstyle to a module from other modules of the same character. With “hairstyle customization,” you can customize the hairstyle of the module you choose. Previously, hairstyles and modules came as a package deal, but now you can combine your favorite costumes and hairstyles to create an even wider variety of character customizations. Some modules, however, will be exceptions due to their outfits or other restriction factors.
Survival Course is a mode for ‘advanced users’ that gives players a single life gauge and stacks the several songs specified for each course on top of each other to be cleared one after the other. The order the music is played is random, and you can only select the first song. Your “Life Gauge” and “Combo Number” carries over the the next song. There are several courses, as well as online rankings support for each course.