Hi,
do you mean something like "what's new"? Then the help is a good start: >>>click<<< (you'll find there new commands and sysvar/modified ones/obsolete ones) or some blogs already out there (like >>>as part of www.cadsetterout.com<<<).
If you have already installed AutoCAD 2015 you can switch within the new start screen to the help side and have some info's about new functions (not all features/modifications), I guess Autodesk don't have enough people to complete a job as they did it in earlier releases called "new features workshop" 😉 )
- alfred -
Hello
http://cadablog.blogspot.fr/2014/03/an-overview-of-features-tools-and.html
http://www.cadsetterout.com/reviews/an-introduction-to-autocad-2015/
http://www.ellenfinkelstein.com/acadblog/autocad-2015-whats-new/
etc ...
Patrice BRAUD
link
cw