Apple Watch sales have fallen almost 90% since the device hit shelves. Some are mulling the potential that Apple Watch is a bust, with only 38% of reviewers giving it a thumbs-up. While contributor Gene Marks sees similarities with the Google Glass crackup, he says Apple Watch's potential fail is much worse. First, Apple Watch is not an experiment, but a huge market launch with huge marketing spend; and second, it isn't revolutionary or even that innovative.