It’s terrible and an unsolvable “problem” that many have tried before and there’s no way of getting this right.

Transparent UI components always add noise by nature, especially glass that is intended to be realistic - see all the refractions shown in the keynote.

Aqua was also playful and suggested the same feel but never got in the way of clarity and was beautifully implemented almost feeling revolutionary at the time.

What is on point for VR use cases where this is taken from, unfortunately ruins a desktop or handheld experience.

A massive loss of precision, focus and a big step backwards.