Reply to So... I'm getting a S4?

Talked it over with the wife and looks like I'll be going from a MPD 32 and Virtual DJ to the S4 with Traktor!
Should be here at the end of the week.
I have an older Dell and my wife has a Mac, will I notice a difference between the two?
I've grabbed a tutorial on Traktor from 2010, is the software roughly the same as 2013?
Should I keep the MPD 32 or sell it?
Any thing else I should know/ expect?

It's like christmas!