I have a Dell XPS 15" touch screen, 4th gen intel i7 16GB with 512GB SSD, Nvidia Geforce 750M 2GB, and I can tell you first hand...running Premiere Pro and full Adobe Cloud apps that my setup is not powerful enough.
I am looking into a desktop...I get choppy playback consistently enough when trying to work on clips in Adobe PP, that it just doesn't make sense trying, with even the fastest laptop...
Just my thoughts...I love my laptop, and I use it for Lightroom picture editing...I also will suck it up and cobble together clips using PP, but in the long run, I think desktop is the move for any serious editing.