This concept of Windows Handheld was developed as a part of 'handheld gaming device design' for one of the semester projects. Any product of such scale (OS) has to have a strong design system in order to be consistent and to have a proper identity. Keeping that in mind, the new Fluent Design System for Handheld was developed in line with existing system along with few screens, teasing what Windows Handheld OS could be,
Widgets:
New Gamebar
Quick games, accessible through handheld shortcuts