If you look at the guitar pictured in the Guitar Hero promo page you will notice what looks like new buttons on the base of the fretboard. Knowing about the expanded new drums, this could mean that they are going to increase the complexity of the guitars too, requiring even more dexterity than previous versions. Note to Guitar Hero people: no matter how complex you make it, it still won’t be a real guitar. [Guitar Hero—thanks Alex]
https://gizmodo.com/heres-what-the-guitar-hero-iv-drums-look-like-390364
