I don't think anyone had doubts about 1GB of storage being technically possible in 2004, the suprise was that they were offering 1GB of email storage for free.

I don't think anyone had doubts about 1GB of storage being technically possible in 2004, the suprise was that they were offering 1GB of email storage for free. 1GB of storage was approx. $1 at the time Gmail was first offered. Whereas I'm sceptical of the technical/practical feasibility here - more like if someone came along and told me they were going to bring consumer-grade jetpacks to the market that people could use for their daily commute I would be sceptical that they could bring that to market successfully for a variety of reasons other than price/commercials (e.g. safety). This is before we even start talking about getting FDA approval for sticking all this stuff into a contact lens (so they will need to presumably prove it doesn't increase the chance of conjunctivitis, corneal abrasions, and eye irritation). IMO it's quite clear from looking at the existing version that it would cause eye irritation - there is a big block sticking out the front.