Then more compute has to be moved off the wearable. And bulkier wearable for bigger battery. Maybe the retina is sensitive enough for really low power lasers. B

Then more compute has to be moved off the wearable. And bulkier wearable for bigger battery. Maybe the retina is sensitive enough for really low power lasers. But contact lens seems more complex tho. Also Google Glass probably had other problems, it was ahead of time. And it was not really AR, you had to focus on the image inside the glass or the outside world.