Technically quite a big difference.

I'm not sure what part of meta delevoped that, I can't find those names in linkedin. I vaguely recognise one name but can't be sure about it.

In meta, there are a number of research teams, SOme are pure hardware, although they are less now, some are software and some are about specific modes of interaction. Ie agios is about touch, opals are about displays (assuming they exist anymore) surreal is about visual understanding and graphics is well, graphics.

Surreal built a "ego centric" platform, ie research perv glasses. They are quite capable https://www.projectaria.com/

Recording data is easy, processing and making that data usable, within the power budget is hard.

On the face of this, its trivially simple to do. Just record all that video and sound, do some STT facial recogntion and location extraction and jobs a goodun.

Doing it with a total power envelope of <500mwhrs is the hard part.

However, in terms or problems. These glasses have the ability to precisly locate the wearer. By inference it can locate anything it can see. If you have more than one wearer, you can locate lots of objects/people in real time.

This means that you can trivially map people's movments,s thoughts and actions in more or less real time.

Great for advertising, great for visually impaired, shit for everyone else.