To address what you mentioned:
* First LTE phone means they were ahead on hardware integration, testing, and price to get to market first.
* The Low-MP camera demonstrates that they saw the end of the highest-megapixel wars and the shift towards picture quality being subjective.
* BoomSound has certainly kicked off a trend, The iPhone 7 made a big deal (TV ads, etc) about its much louder dual speakers. Nobody before HTC cared about phone speakers.
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