I have never used Meta Eyeglasses before:

However, the way they are described in the Ray Ban article: 

Here's what I could find on Meta Smart Glasses:

The way they are described I could see these things great for listening to music or talking to your preferred AI. I also could see these being developed for Alzheimers patients and patients with other forms of Senile Dementia both of which are fatal diseases.

The way they could work is people could ask their Meta AI eyeglasses who they were and where they were if they were alone (for people still that functional). Often people just need a trigger to remember more what's going on at various stages. 

However, I could see they function a lot like Alexa where you can ask Alexa to play music and stuff. My son has an Alexa programmed to turn one light in his living room and also  turn on different colors of this light as well by talking to it. So, AI in this form can play music through your meta glasses or take pictures or movies of what you are looking at by talking to it I believe. I'm not sure how well all this works because I have never tried a set of Meta Glasses that do this.

However, I think instead of smart phones we likely are moving over to sunglasses we can talk to that we wear while having phone conversations and for talking to our AI when we want or need to and for asking it "Like Siri" to play a certain tune for us through the eyeglass pieces that go over the ears. I think the also make the glasses like mini-TV screens to play back 60 second movies or photos that you take when you ask your glasses to take videos or photos of whatever you are looking at at the moment anywhere on earth or beyond. 

So, Meta Glasses might well be the future of Smartphones in the future as memory becomes more

 micro-miniturized than it already is.

However, it might be safer if it was relaying information to your smartphone in your hip pocket so you don't get all that sending blue tooth stuff going through your brain like you do when you hold up your smartphone to your head to talk. However, mostly I think it is microwaves you are cooking your brain with while putting a smartphone up to your head. This is why I use the speakerphone or wired earphones to talk usually instead of putting any smartphone up to my head except in some kind of emergency.