βΆAR vs VR vs MR vs XR β what's the difference?
VR (virtual reality) = fully immersive 3D world, no real-world view. AR (augmented reality) = digital overlays on camera feed (ARKit, ARCore, Niantic). MR (mixed reality) = AR + hand tracking + occlusion (Apple Vision Pro). XR = umbrella term for all three. Most apps now ship as MR: AR passthrough + spatial computing.
βΆUnity vs Unreal for XR β which should I learn?
Unity XR Toolkit dominates mobile VR (Meta Quest, mobile AR). Unreal Engine stronger for high-fidelity PC VR (Half-Life: Alyx, Lone Echo). WebXR bridges both (browser-based). Start with Unity for faster iteration; Unreal for AAA fidelity. 2026: Unreal 5.5 XR plugin catching up on mobile.
βΆApple Vision Pro adoption β will it replace VR headsets?
Vision Pro is spatial computing, not pure VR. Expensive ($3.5k), targets enterprise + enthusiasts, not mainstream. Meta Quest 3S remains volume leader ($299). Both coexist: Vision Pro for productivity/MR, Quest for gaming/social. 2026 trend: Vision Pro apps (React-like, SwiftUI), Quest 3S value play.
βΆWebXR vs native SDKs β when do I use browser-based VR?
WebXR (Babylon.js, Three.js): fast distribution, no app store, cross-device. Native (Meta Quest SDK, ARKit): lower latency, better performance, offline. WebXR good for lightweight AR (try-ons, navigation), enterprise kiosks. Native required for competitive gaming, high fidelity.
βΆHardware fragmentation β how do I target multiple platforms?
OpenXR abstraction layer handles Meta Quest, HTC Vive, Valve Index. Use platform-agnostic APIs (XR Interaction Toolkit in Unity). Test on device targets (Quest has 3 generations). Accept tradeoffs: foveation, hand tracking, passthrough not always available. Build fallbacks into your UX.
βΆMotion sickness β how do I make comfortable VR?
Frame-rate floor: 90fps on Quest, 120fps on Vive. Reduce head tracking latency (< 20ms). Smooth locomotion worse than teleportation for novices; build both. Avoid rapid acceleration, spinning cameras. Provide vignetting on edges. Test with non-gamers β they're your motion sickness canary.
βΆWhat XR platforms are winning in 2026?
Meta Quest 3/3S dominant in consumer VR (market leader). Apple Vision Pro emerging in spatial computing / productivity. ARKit/ARCore in mobile AR (billions of phones). WebXR growing for low-friction trials. Niantic (PokΓ©mon GO) leads location-based AR. Enterprise: Varjo, Magic Leap fading; Meta + Apple win.