I've recently gotten into amateur astronomy. The modern high-end telescope eyepieces, usually low-power with a really wide FOV, often now have 7 or more lenses and can weigh 2 pounds.

This research looks amazing. It could change the game once again, enabling even higher quality and wider FOVs in a broad range of focal lengths (from what I've read, there has been a lot of improvement in the past few decades already). Probably won't be cheap though.