The HoloLens, a mixed reality headset launched in 2016 and discontinued in 2023, didn’t capture a large enough market to justify continued investment and only sold 300,000 units. It failed because its usefulness never grew over time, while it has a limited field of vision and the virtual objects are only visible in a pretty small square in the middle. Meanwhile, competitors like Apple and Meta became dominant players in the consumer AR/VR space.