Nokia has announced their new Top phone featuring the Windows Phone OS with the big attraction of the 41 Mpixels sensor that had already stunned the world about a year ago when they announced the Nokia 808 Pureview (featuring a Symbian OS).
The Lumia 1020 comes with a Qualcomm Snapdragon™ S4 Dual-core 1.5 GHz CPU, with 2 Gb of RAM and 32 Gb of internal memory (+ 7 Gb on the cloud) with no SD card slot. The display is a 4.5" WXGA (1280 x 768) featuring the PureMotion HD+ and will be an AMOLED, while the Lumia 920 was an IPS type of display. This phone will be powered by a 2000 mAh battery.
Regarding the camera, the main attraction, it will have a 41Mpixel sensor with Optical Image Stabilization, with a 6 elements lens from Carl Zeiss. Also worth to mention that it will come with the Pro Camera software which will allow control of shutter speed and manual focus. Like the Lumia 925, the ISO will be from 100, up to 3200.
If you want to learn more about the technical details of the camera and the difference between the one from the Nokia 808 and the Lumia 920, read this article: http://themobilephotographyblog.com/general-discussion-about-mobile-photography-and-accessories/the-new-nokia-lumia-1020-a-technical-comparison-to-nokia-808-and-lumia-920/