Sample decks, more effects and Interesting that you can export your playlists to rekordbox format if you are playing with CDJ's is pretty sweet for keeping things cross platform.

Both MixVibes and Rekordbox media collections use the same standard .xml format : Rekordbox users will be able to import their complete Rekordbox database into Cross/ CrossDJ including their cue points, hot cues, loops and beat grid info.
And its only $39 I guess they fact that NI are giving the full version of Traktor along with an audio interface for $99 will have most software only dj companies a run for their money.

I'm really digging the proper 4ch mixer layout.

Nice upgrade price too .... $0