I don't believe that poster is deaf. I'm hard of hearing, and I love the tactic feedback of the watch. I never hear the iPhone ding, so the only way for me to know that a noftificatiion has come in is of I feel the phone vibrate. The watch does away with having to have the phone on my person in order to get notifications. I think most deaf and hard of hearing people would appreciate the tactile feedback of the watch, and find it useful even if they can't use Siri. (And as another poster pointed out, some deaf people could speak well enough to use Siri.)
I am sorry you don't believe I am DEAF?? Wow you make me feel better that I am a hearing person. I shouldn't have gone to Gallaudet University at first place.