The leaked website for the XPS 9560, specs, and CES display model all showed the update to the popular 9550 would sport a fingerprint scanner. The latest information from the company suggests that it does not currently have one, but may get the option soon.
http://www.notebookcheck.net/The-XPS-15-9560-s-fingerprint-scanner-has-gone-AWOL.191316.0.html