I don't see how Glass is even close to DOA. Modern smartphones and tablets are the descendants of product lines with long histories and experienced user bases. Outside of research projects and limited use systems, Glass has little to go on, and a very limited number of understanding potential users. Google is slowly drumming up interest and openly experimenting with its use in public. Google wants early adopters who are thrilled with an expensive, potentially life altering product.
It might suffer from version-1-ness, and it might be version 3 or 7 from Apple or whoever that takes off. It might simply be too early. I'm pretty sure a lot of the enthusiasm that's around now is going to lead to disappointment when what people are dreaming about isn't supported by available technology.
The other factor is that the primary concerns are precisely in google's tonedeaf spots- design and privacy. Google as a company isn't very well equipped to deal with either of those issues.
