The 2016 version of TeX Live (and MacTeX for Mac OS X users) is now available for download at tug.org/texlive (or tug.org/mactex in case of OS X). You can install TL 2016 beside older versions harmlessly and optionally delete the old version(s) afterwards to save some disk space.
Happy TeXing!
PS: Members of TUG and/or dante (and probably other TeX user groups) will receive a copy on DVD. So join the one of them 😉