The upcoming HTC Shift UMPCs will feature two operating systems: Windows Mobile and Windows Vista Business:
As previously mentioned, the Shift features an 800MHz Intel processor along with 1GB DDR2 memory, 7" screen (1024x600, 800x480), 40GB HDD, 802.11g wireless, Bluetooth 2.0+EDR, 3G wireless (HSDPA), slide-out QWERTY keyboard, a 1.3MP webcam and a biometric fingerprint scanner. In addition, the Shift also features a secondary Qualcomm 400MHz processor, an additional 64MB RAM and a 32MB flash ROM.
The secondary processor and memory are what makes the HTC Shift special. With the push of a button, it can instantaneously switch between Windows Vista Business and the Windows Mobile operating system (running at 640x480). When operating in Windows Mobile mode, users can still access features such as weather, email and contacts. In this mode, battery life is an astonishing seven days versus roughly three hours when using Windows Vista business.
HTC still hasn't announced a launch date, pricing details aren't available either but it will be rather expensive.