Pioneer have taken their CDJ line and used that interface look 'n feel and created a midi controller for Traktor users. Check out this video by Spanish Techno legend Cristian Varela.
I have to say it's a very nice looking controller and they do something interesting by placing the laptop underneath the control, which gets it out of the way in a club scenario -- but then you've now lost the ability to search with the keyboard or use any of the keyboard shortcuts you have. Pioneer seem to believe that you can do everything with their controller.
In saying that, the DDJ-T1 looks like it's the first controller to give the Traktor S4 a run for it's money -- despite being $300-400 more.