You're quite correct IMO. And if that's all they release they will have lost out on quite a large number of sales judging by the attitudes of a lot of people on here. That's not to say they still won't shift loads.
Note to self: don't be fooled by the nice man doing a staged demo of the assistant looking like it's the best thing since sliced bread. You know it won't work that well and you'll look like a tw*t talking into your phone and texts are rarely that urgent they need to be sent in the car. He'll more than likely say, 'This will change everything', but it won't. You're 4 is plenty good enough, you don't need a 4S.