I'm going to first preface that my next comment would usually be regarded as trolling flame bait, especially here in the Alternatives subforum but want to emphasize that's not my intention and that it's genuinely meant to be complimentary.
<braces himself for the onslaught...>
Those bear a serious resemblance to the latest iPhones. And IMO, it's a good thing.
I'm not making any accusations that HTC is just copying Apple. In fact, the latest iPhones have a serious resemblance in some ways (rear panel) to the last two HTC flagships. What I think they've done (assuming these are genuine), is perfect the design and form factor. I know many don't like the iPhone design because let's face it, while striking in layout and build materials, they also are more susceptible to easy damage, having so much glass and aluminum. That being said, I think they are very elegant, feel solid and sturdy in one's hand, and are genuinely very well made. I personally find the HTC One devices to be the Android equivalent.
These devices from HTC appear to follow in that vein and then improve on it. They've taken the best of their last two flagships and improved their greatest flaws. Love or hate the iPhone, the full glass front with the waterfall type edge feels terrific in hand and to use, especially when it so seamlessly transitions to the rounded aluminum edges. Gone are the gigantic forehead and chin, presumed to be necessary to accommodate the boom speakers, yet retaining the stereo speaker layout. Shrink the bezels on the iPhone and this is what you'd get.
My only disappointment is regarding the larger device. I think the design on the left is gorgeous--clean, simple, elegant. I hate that HTC feels the need to follow suit and integrate a fingerprint sensor into the larger device (my preferred size now) and muck up the design a bit.
I used a developer edition of the original HTC One much of 2013 and found it to be a fantastic experience, save for the camera (of course). I find Sense to be the software equivalent of HTC's hardware design--clean, elegant, simple and the best of the Android skins. Considering both these images and recent specs leaks, I'm REALLY looking forward to HTC's event early March. These devices have the potential to be the near perfect Android handsets.