I'm guessing this thing isn't going to be as elaborate as people are making it out to be. My shooting-in-the-dark guess is that it's going to be a new type of fishbowl cage that has side ventilation ports, or a much larger, full face, contoured visor. If you re-read the Dreger text, it just says "help protect", which insinuates that it reduces risk, not eliminating it...
And I agree with stick9. If these are optional, most will not wear it.