My first thought was: This seems like a very logical next step in order to prepare for future broader market adoption of AR applications and AR glasses.
Being a sceptic about the latter at first I must say, I wish the technology would finally allow having a "normal" pair of glasses with high resolution, no cable attached, AR overlay screens.
So if that really might be the way forward in mind when developing liquid glass, I think they did a pretty good job. Curious to see how this works in more complex UIs - I'd expect, that it has to play along with a very reduced number of visible UI components in sight.
Being a sceptic about the latter at first I must say, I wish the technology would finally allow having a "normal" pair of glasses with high resolution, no cable attached, AR overlay screens.