The Wirecutter has a good overview of all of the news from the WWDC 2013 Keynote. If you are interested in the news … head over there and read it. There was a lot covered.
I’m, obviously, excited. However, I don’t have experience with anything announced so I won’t really put down my opinions on this blog until I get to play with something.
However, from what I have been reading and seeing from WWDC, there is a lot more that is to come and a lot of really fun things. OS X Server looks to be getting a pretty decent update, especially for development teams.