The typical gaming laptop has a GPU that is easily more powerful than what is used in the consoles. I believe the PS4 has a GPU that is similar to a Radeon HD 7850 that was released back in 2012; the GPU in the Xbox One is weaker. However, games designed for consoles are more streamlined than for PC because the hardware on all PS4 (or Xbox One) is the same for each machine. On the other hand, PCs have hundreds of thousands of different configuration with components manufactured by hundreds or thousands of different make and models each with specific drivers. Therefore, program codes for PC games are not as streamline as for consoles. On top of that Intel CPUs far exceeds the performance of AMD Jaguar cores used in the consoles.
The Razer Blade Stealth is a nice ultrabook, but it only relies on the Intel HD 620 graphics core so you will need to buy the Razer Core and a dedicated desktop GPU if you plan on doing any serious gaming.
- Get a laptop with an Intel quad core CPU like the i5-7300HQ or i7-7700HQ *
- At least a GTX 1060, but if you want to play games at QHD resolution, then a GTX 1080 is highly recommended.
- A laptop with an IPS screen
- At least 8GB of RAM
- SSD for fast boot time and loading games.
All that depends on your budget. A laptop with a GTX 1080 generally cost at least $2,400 from what I recall.
* The basic difference between a quad Core i5 & i7 CPU is that the i7 has Hyper Threading (HT) which allows the CPU to process two threads of instructions instead of 1 thread. The vast majority of games are not designed to make use of HT.