Google Glass is coming, and with it (I’ll bet) any number of similar me-too products from other manufacturers.
Glass is a sophisticated piece of technology, packing many features into a tiny package. It is an expensive gizmo though, even assuming that the actual price point will be significantly lower than the $1500 demo units. And users still need to connect it to a cellphone for best use (i.e. data package), although it can also connect to WiFi directly, where available.
The question I have is that if the user is still going to need a cellphone anyway, why not remove a big chunk of the functionality from the glasses, and rely on the phone instead? In doing so, a competing product could have identical (or at least very similar) functionality at a far lower price point.
All that’s required is a camera, a small microphone, a tiny LCD display, and some method of connecting to the phone (could even be a lightweight fiber-optic cable for high bandwidth and improved privacy). These are relatively cheap components, compared to having a separate device with its own WiFi, Bluetooth and GPS capabilities (not to mention a CPU of its own and fairly substantial amount of RAM – there’s a nice list of Glass’ features on Wikipedia, here).
Where things will really get interesting, of course, are the next generation of devices after…