In between the $99 Note 3 and the $650 Amazon phone there's an entire universe of better phones.
While there's some cool software included with it, I honestly don't think any of the things on show are killer features worthy of the price difference. The main special feature appears to be a "identify this item" which is basically what the amazon app on android already does, except now there's a dedicated button for it.
Do people really walk around identifying items for purchase to comparison shop on Amazon so often a dedicated button needs to be built into the device?