“NASA’s Landsat 8 satellite to launch on February 11
NASA is set to launch the Landsat 8 satellite [tomorrow], the latest in their ongoing Landsat Data Continuity Mission (LDCM). This launch is exciting as this will be one of the best image-capturing satellites in space, anticipated to collect over 400 images per day. . . .” here, sample images
If all goes well, the images should begin to arrive from mid May 2013 onwards. When they will replace the earlier imagery in Google Earth is not yet announced.