This is the HTC Omega, an upcoming Windows Phone 7 device from HTC (likely to be announced at the September 1 press event). It’ll come in a white/silver color combination, perhaps with aluminum construction, and may be called the HTC Radar upon release.
Rumored to be powered by a 1.5GHz Qualcomm Snapdragon MSM8255 SoC (likely to be single-core), and include 512MB of RAM, the HTC Omega also features a front-facing camera, perhaps ushering in the era of Skype integration on WP7 devices for video chat.
The rumor mill puts it as having a 3.8″ SLCD display and an 8MP camera on the rear. We also expect HTC to announce a second, higher-end Windows Phone 7 next week, codenamed the HTC Eternity.