Progress is the point. Will it work? Will it really be useful? I don't know.
I do remember buying the first personal computer at my company (yeah, I'm that old). I showed a couple of our accounting/finance guys Visicalc. They thought it was stupid and told me that they already had systems for all that and that nobody would use it. Initially, they were right. It just took some time and improvement and trials and failures and some successes. Some things worked and some didn't.
So, will Siri be a success? I don't know, but I'll try it out and see if it really is useful. Maybe it's the next iPad or maybe it's the next Newton. I've tried both. iPad works for me. Newton, not so much...but it led to better things.
BTW, not looking forward to the many inappropriate uses and venues, but they should make for good comedy material...