Because it's been determined time and time again that Siri on the iPhone 4 is not limited by the hardware.
but...it...hasnt. the tech in this story confirms the inverse -- that Siri works *best* when it has its supporting technology to ensure it "hears" you properly. that tech does not exist in the A4, and the iPad2 does not have an additional noise cancellation mic like an iPhone does.
just because somebody hacked it to work in their den doesnt mean its going to work *well* in the field...in noisy bars, etc. simply put: if it dont mean apple's stringent reqs, they arent gonna green-light it.
get it? try harder.
----------
The simple truth to the matter is Apple put a BS software block for no other reason than to sell more
simple truth? according to you? surely not you -- youre no iphone engineer...youre not an apple executive. nor are you a marketing insider. so really, what makes you think youre qualified to determined truth?
to the contrary, theres growing evidence (like this story) that it's indeed hardware that gives it the best working experience. sorry that makes you sad.
----------
I'm pretty sure the title of this article wasn't "iPad 2 doesn't have Siri because it lacks 2nd microphone." But if it was, that STILL doesn't explain why the iPhone 4 lacks it.
...because it doesnt have the cited APIs in the A5 chip it doesnt have. iPad2 does have an A5, but doesnt have noise cancellation or proximity sensor.
how much clearer need it be?