As per the latest report from the below source (link provided) suggests the Samsung Galaxy S8 will come with facial recognition scanner along with earlier rumored iris scanner and fingerprint sensor (which is now located on the rear side).
"Due to some limits of iris scanning such as speed and accuracy, we have decided to add facial recognition to the Galaxy S8," the report cites a Samsung official as saying. "With a face scanner, it will take less than 0.01 seconds to unlock the phone."
The South Korea giant is prepping for it's Unbox Event which is scheduled to take place on March 29, the device will make it's first public appearance at the event and will go on sale a month later.
Source | Via