Yeah, this "laptop" is actually a very, high-end machine -- they call desktop replacement". The machine that uses that PSU was about $11k. People use lesser versions of this for gaming and this sort of thing. I use it for work. I have to run intensive applications for 3D modelling, animation, graphics, virtual reality worlds, and this sort of thing. My desktop is even crazier than that laptop -- more room for RAM and also PCIe SSDs, liquid cooling, etc.
Thanks!