Get a PS4. much cheaper in the long run. Having to pay around $1000+ every 3-4 years to play newer games properly becomes a pain in the ass. PS4 & Xbone games also look better on a 50"+ TV. With that said, a gaming PC looks much better overall when the game is actually optimized for it. I.e. Isn't a shitty port.
it doesn't cost much to upgrade your PC every now and then. You'll be spending like $200 on a up to date graphics card at the most. Instead of 600 on a new console. Plus games are cheaper, much cheaper. A good gaming rig now a days to run medium settings or even high, can run higher specs and blow the PS4 out of the water.