> You could use glasses, but not everyone wants to wear them.

What about contact lenses?

I don't see how that could physically work. To present a high fidelity bright, clear display has irreducible base power requirements, and I don't see any way to provision that amount of energy in the form factor. Signal reception would also be a problem, and then there's the issue of dealing with thermal losses. Thermodynamics is not our friend, especially for powered devices in physical contact with our eyeballs.

Contact lenses are a pita. I suspect it's going to be a smartphone-like form factor combined with a voice UI similar to the movie Her from 2013. Eventually the visuals on the phone screen will be replaced with a neural link. It would make sense if the implant is just a dumb antenna, combined with a removable "earbud" that connects it to the computing device.

We have not conceived useful applications that actually require AR yet. It has to be something requiring immediate feedback - maybe driving a car or piloting a similar vehicle would be such application. Maybe stock market. Or something entirely unforseen, like data analysis or warehousing - using human intelligence better?

Voice is much too slow, as is listening - might as well use the current devices at those speeds.

Computers started with bookkeeping and mass production control. It took quite some time for them to penetrate office market or to (partially) replace the previously used communication tools.

Yes because contacts are an absolute pleasure in comparison to glasses.

Are you being sarcastic? I've been wearing contacts and glasses for nearly 40 years. Contacts are absolutely an absolute pleasure compared to glasses. I only wear glasses when I absolutely have to (i.e., right after I take out my contacts until I have to go to sleep at night and vice versa in the morning). For instance, I hate working out in glasses. They get all foggy and start slipping down my face from the sweat. Doing high intensity sprints in glasses is the worst.

You're thinking very small-picture here. Contacts can be improved upon somewhat if we have the technology to make them into full AR screens.

As could glasses, starting with how they're kept on your head and the weight. Just look at how far VR helmets have come, or skiing goggles. There's more that can be done still, but not enough pressure to do it.

Yes, this is correct.

You can't readily "disengage" from contact lenses. Imagine getting hacked and somebody beaming shockporn onto your vision.