You don't have to upgrade your PC.
If people are happy with the lack of AA/AF with an avg 30fps at 720p then even a 1900xtx is more than enough.
Resale value has never entered my mind, i give my console games away after im done.
You are wrong actually a high percentage of console gamers now are ex pc gamers that are fed up having to upgrade every 6 months.
Nobody wants to play games on low details.