I don't have a 4S, but some of these screenshots already reveal some stunning limitations. For example "take a photo" doesn't seem to work (on a mobile phone, wtf?) and the proper response to "I think I just killed someone" should not be "oh did you?" but something more along the lines of "do you want me to call an ambulance".
On a side note, I believe Apple is making a fundamental mistake with Siri in not communicating its limitations more clearly (or at all). Sure, the marketing department probably wants to make announcements to the effect of "oh, this baby can do anything" but soon customers will find out that's not the case and be thoroughly disappointed after the novelty factor wears off. Siri is a prime example of this shortsighted marketing move because its capabilities are murky and unknown by nature.
Putting out a clear bullet list of things it can do (like: make cal entries, notify, simple if-then logic, GPS data, Google lookup) would work much better in the long run.
The only real limitation you bring up is not being able to take a photo (I'd add reading email as well, not just texts). But there's no reason Siri has to maintain its current capabilities.
Have you read reviews of people struggling with limitations? Also, Siri offers a list of suggested tasks it can perform from the iPhone itself, based on the videos I've seen.
"Siri, on the other hand, feels limitless. It’s fuzzy, and fuzzy on purpose. There’s no way to tell what will work and what won’t. You must explore. I found it extremely fun to explore Siri — primarily because so many of the things I tried actually worked." -Daring Fireball
Even if Gruber is an Apple fanboy, I would suspect people to react more like him than you.
On a side note, I believe Apple is making a fundamental mistake with Siri in not communicating its limitations more clearly (or at all). Sure, the marketing department probably wants to make announcements to the effect of "oh, this baby can do anything" but soon customers will find out that's not the case and be thoroughly disappointed after the novelty factor wears off. Siri is a prime example of this shortsighted marketing move because its capabilities are murky and unknown by nature.
Putting out a clear bullet list of things it can do (like: make cal entries, notify, simple if-then logic, GPS data, Google lookup) would work much better in the long run.