The narration was not in English, but from the previewer we managed to grasp that we get a 4.7" Full HD screen, just as rumored, along with a quad-core Snapdragon 600 processor, 2 GB of RAM, 32 GB of internal storage, and a 2,300 mAh battery inside. The new Sense 5.0 interface in its full glory looked modern and minimalistic, as well as the handset design itself, at 9.3mm thin.
The sound from the front speakers is claimed to be 93 dB, which is pretty loud by any standard, and the Snapadragon 600 supposedly makes about 12,000 points on Quadrant, which is great as well. Android 4.1.2 is running the show, with an update to 4.2 in the works. The biggest mystery remains the camera, which utilizes some combination of pixels that result in lower resolution than what the camera is capable of in normal mode, but with supposedly higher quality.
In any case, all will be revealed very soon, and we are reporting live from HTC's event in NYC, so make sure you stay tuned for the grand One unveiling.