Yeah it is. To even expound on the return on investment one needs to delve into what they will be doing on their PC.But nobody is arguing the original issue... for $1900 or $1500 or $2400... is the upgrade worth 4x-6x the cost of a ps4? are you getting a good return on investment here?
For starters, the $1500 PC if we kept it strictly about gaming would:
Allow you to play games however you want e.g. framerates up to 165fps which would absolutely look night and day to even 60fps games with Gsync/Freesync
Play at whatever resolution you decide to play at(4K/4K Ultra Wide, 1440P/Ultrawide)
Play with higher graphical details
Play with comfort settings not really applicable on consoles(FOV, better aiming with Mouse/Keyboard)
Play with mods that cannot be done no consoles(First person RE2 mod)
GTA V Redux Mod
Pratically every game has a mod that just does things not possible on consoles
Then we can get into the emulator game where you can play whatever console/handheld on your PC at levels not seen before:
Modding MK8 with graphics like this
Then you got audio mods, overhaul mods that change a game completely
Then we can get into the things you can do on a PC that you can't on a console which are obvious(thousands of programs) and equipment you can plug it into. I mean at this point you got to be dense as hell to not realize the benefits a PC has over a simple console.