Here's Razer's newly released Razer Blade:
http://www.razerzone.com/ca-en/gaming-systems/razer-blade
Keep in mind this is utilizing a 14" screen. This new Razer Blade incorporates a Quad-core CPU and Nvidia's latest GTX1060 GPU, all in a form-factor that's smaller than the 15" MBP. So if Razer can do it, definitely Apple should be able to do it.
very interesting. funny how it even looks like a macbook. only sad part is, nvidia and apple have not played nice together for quite some time now (still no *real* 7xx or better support) and i dont think AMD's mobile offerings are as competitive in that regard. but its nice to see somebody is making it happen, and hopefully, you're right.