Unless you live in a country outside of the US, a PC that will output a stable [email protected] or [email protected] will only cost around $910-1020 USD with all the gaming peripherals assuming you will be gaming on your TV. Even with a monitor, it could only be around $1500. Wildly inaccurate to say you need a GTX 1080 and a $6400 rig to match a PS4 Pro. An overclocked RX 480 will do the job just fine if not give you better performance matched with the FX 6300 mentioned in the article.
Source: Own an FX 8350 with a GTX 1080. Have built and tested rigs with RX 480 and GTX 1070. http ://pcpartpicker .com/list/ssRwYr