I bought my mum an Amazon Echo http://www.amazon.com/gp/product/B00X4WHP5E/
She liked Kindle e-readers since I bought her one of the first ones, and she has Amazon Prime.
Unlike most gadgets that push the speech recognition boundaries, the Echo is a true delight. Straight out of the box, with just a couple minutes of setup, it was responding to everyone's commands and, in the vast majority of cases, delighting, not frustrating. That's an enormous accomplishment for a product that is, in many ways, much more ambitious than Amazon's failed attempt at a phone.
Speech wonks will be amazed at the accuracy of recognition. You don't have to be anywhere near the Echo to speak a command. It is a triumph of speech hardware/software integration.
Everyone at the Christmas visit to grandma's was charmed by Echo. My mum just sent an email indicating that the charm hasn't worn off.
There is only one minor quibble: The Echo can play Audible audiobooks, but it cannot read aloud a Kindle e-book. We did not even explore any of the home automation tie-ins, so I can't say how well that works.
Echo is a winner and will probably pull along a lot of Kindle Fire tablet sales and will be an anchor of Amazon's strategy to dominate entertainment. Maybe not iPhone huge, but Amazon deserves to get a huge boost from this product.