It appears to be certain now that Lightroom 6 will be out today. PCMag.com published an article giving some background information. Apparently, the software will be available in the Creative Cloud as Lightroom CC and as an equivalent stand-alone license under the name Lightroom 6 for $149.
Check out the video below to get a glimpse of the new Facial Recognition feature.
Other improvements include a panorama function, a feature for merging two images into an HDR, and massive performance improvements. Adobe officials are quoted saying that some features are running almost 8000% faster that in Lightroom 5.
The Graduated and Radial Filter tools are apparently also improved with new brush functionality. It can be assumed that these improvements are similar to the Adobe Camera Raw Updates seen last year.