If this product can fix some problems with Google Glass, I'll buy one at twice a reasonable price.
Google Glass never looked comfortable or stylish. The camera made everyone uncomfortable. The battery wasn't great, and the resolution was terrible.
If Apple can come in and make it look reasonable, omit the camera, take advantage of some recent semiconductor technologies like fin fets or fdsoi, and make a 800x600 or 1024x768 screen, they have a blockbuster on their hands. I want to be able to access my digital world (Facebook, games, email, texts), and I want it to evolve into something better than what I've got. Already I barely use my home computer daily, no longer multiple times a day. My cell phone is my current tether to the internet. I'm not particularly enamored with it, but if it becomes a secondary device for my glasses -- cellular modem, hi def screen for necessary tasks, GPS, CPU and whatever chips eat the most power -- that's a great benefit.
For me, visual displays are "complete" when they can use a laser (or whatever) to project onto my retina a fully focused image that's of a "normal" brightness, taking the same arc size of a 24" screen a foot away, with a resolution better than I can detect. Glasses are the next logical step to this panacea.