The question isn't really with use cases, it's about practicality. Having instant access to what you do most of the time with a smartphone is practical. People certainly will appreciate that; it doesn't matter if the use cases are limited in nature.

Of course, the price is too high for what it offers right now, but it's kind of like the Pixel: a vision of the future that can be attained relatively easily for anyone with the dough. It's not going to be an ephemeral flop like the Newton was; I foresee it being a major influence on other devices. The Newton wasn't like this -- PDAs were already being developed at the time. So far, we've seen nothing like Glass. It's a milestone.

So it will take time, and it is a paradox to have two devices that do the same thing connected to each other, but Glass is only going to spur a big change.

The Newton did not.