I really wanted HTC to knock it out of the park on this one, and they haven't. In my opinion, the original One was much better looking. On top of that, the camera is still 4 megapixels, which even if improved with software still cannot capture as much detail as an 8, 13, or 16 megapixel camera. Also, I hate that the HTC logo bar is still there, but now serves literally no purpose as the buttons are now on screen. And finally, the new location of the sensors next to the front camera is hideous.
On a positive note, getting the phone out the day of announcement is IMPRESSIVE. The new "selfie" front camera is going to take some pretty great shots, especially considering it has a higher megapixel count than the main camera (which is shocking actually).
Other than the points I made above, there's nothing really exciting or notable about the "All New HTC One". There's the upgraded processor, bigger screen (semi negated by the fact that the buttons are now on-screen), and slightly larger battery.
I don't think it's enough to save HTC sadly.