They said years ago that pricing will be more affordable (around 300$) when final commercial version hits the market.
While it's in development it will remain expensive.
I think pricing and usefulness play a large part on this device. If it's priced to high, and there isn't enough useful content or apps offered. Then this will stay a niche product. I loved the idea when it first came out. But this device was never offered to the public, and it was priced too high. I hope the offer better pricing and in more countries. I know Glass was never offered in Canada.
b co's they thought they will first upgrade the technology to a level where manufacturing can produce 4k displays+SOC with-in size of a eye-lens, currently they are at 10nm,14nm,16nm process against required 2nm(3atom, 2silicon+1phosphorus) which is expected to arrive at 2019(Moore theory).....in fact it's the last stage of prossessor manufacturing, we can't make a transistor any smaller.