A speculative device called the Lightbulb Computer combines a bright, compact projector with computer vision and microphone input in a lightbulb-shaped package that screws into standard sockets or sits in a portable base. It detects voice and pointing gestures, analyzes scenes, and projects contextual content onto walls, tables, and objects. Practical demonstrations show pinned widgets in kitchens (recipes, timers), on-the-spot Q&A while reading, shared large maps for trip planning, photo slideshows, quick board-game setups, and direct control of smart-home devices by pointing. It also supports ambient displays - bedside alarms, hallway family boards - and augments physical objects like 3D maps with time-specific overlays. All videos come from a real but bulky prototype rather than simulated effects.
The proposal positions projector-based, room-scale computing as a socially convivial alternative to eyewear-based AR, arguing that head-worn devices are constrained by comfort, power, thermal limits, and social friction. It situates the idea alongside prior projection projects (I/O Bulb, LuminAR, Humane Pin, Dynamicland) but emphasizes personal, home-focused interactions missing from those examples. Technical readiness is near-term: modern vision models and compact projectors make it feasible, though consumer hardware needs refinement. Privacy and safety are highlighted as first-order concerns and can be mitigated with on-device processing and hardware guardrails (user-activated camera, indicator lights, physical covers).
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