a built in laser projector would have a wow factor and I think apple could have pulled something off (e.g. this article is from 2022 https://www.wileyindustrynews.com/en/news/worlds-smallest-pr...)

imagine at work projecting from iphone work slides or whiteboards at work or videos/games indoor at home on a white wall etc (apple loves accessories, and the potential for accessories on this would be huge as well)