The Horizon OS v77 system software update rolled out in the Public Test Channel (PTC), revealing new features and improvements.The PTC offers beta releases of Quest system software, providing insights into upcoming changes and enhancements.The v77 update introduces a major UI overhaul focusing on a new system called the Personal Display, replacing the Universal Menu.Features like Portable Windows and Navigator enhance multitasking and accessibility within Horizon OS.Navigator serves as an overlay launcher for various system functions, integrating Library, Notifications, and Quick Controls.New window capabilities will allow users to place up to three additional apps as Spatial Windows for improved multitasking.Eye-tracking-based user authentication and surface typing experiments are being tested for future inclusion in Horizon OS.The removal of static object warnings and improved Boundary setup streamline user experiences in v77 PTC.Meta's focus on functionality, optimization, and expanding capabilities reflects efforts to enhance Horizon OS and its platform amidst competition.