Laptop vs. Desktop

The display screen is the most important factor. Laptops are constricted to having quite small screens.

I have a Lenovo P53 (15") with a 4K display. I also have a 43" 4K display for my desktop. the 43" 4K display wins hands down of course. I practically need a magnifying glass to read stuff on the P53 that's easily visible on the 43" desktop display.