In virtual reality environments, the alignment of perceptual modalities is crucial for immersion and presence. In the AR domain, it is difficult to create such alignments because elements in the physical world are often beyond the user's control. However, recent advances in generative AI enable on-demand content creation, enabling highly reactive AR experiences. Combined with contextual information about the physical world, it has become possible to design experiences that seamlessly align with the user's environment. In this reflection paper, I emphasize the importance of "synchronized" realities for context-aware AR experiences, particularly in mobility scenarios. I present several examples of existing synchronized experiences and examine their commonalities and distinctions. Finally, I discuss opportunities and pitfalls of synchronizing AR experiences with the physical world.

翻译：在虚拟现实环境中，感知模态的对齐对于沉浸感和在场感至关重要。在增强现实领域，由于物理世界中的元素往往超出用户控制，实现这种对齐十分困难。然而，生成式人工智能的最新进展实现了按需内容创作，从而催生高度响应的增强现实体验。结合关于物理世界的上下文信息，设计能够自然对齐于用户环境的体验已成为可能。在这篇反思性论文中，我强调了“同步”现实对于上下文感知的增强现实体验（尤其是在移动场景中）的重要性。我列举了若干现有同步体验的案例，并探讨其共性与差异。最后，我讨论了将增强现实体验与物理世界同步的机遇与挑战。