Siri does well with smaller tasks and when Apple introduced the M10 coprocessor to be used off the charger, it really did provide freedom to use Siri without even having pick up your iPhone.
I agree that hands free is great.
Is hands free Siri still tied to using a charger?
My 2013 Moto X, which added a low power motion/voice coprocessor slightly before Apple did their M7, has always had hands free always-on listening and readback of texts etc, without taking much of a battery hit.
Keeping it in a shirt pocket is almost like wearing a Star Trek badge to talk to the ship's computer, but without having to tap it. It's always ready for a vocal Google Now request.
And if you also enable Motorola's special assistant add-on, it notices when you're moving fast enough to be driving, and automatically switches into a special hands free mode where incoming calls or texts automatically trigger a vocal prompt to be answered or read out.
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