Ask HN: What hardware technology/startup are you excited about?

While reading a 2020 Ask HN [1], I was amazed that some of the most interesting techs mentioned are hardware, making hardware is difficult and expensive, which also makes it precious and exciting, so what are your picks for exciting hardware(and HW related software) in 2022? [1] https://news.ycombinator.com/item?id=23276456