Isn't it current gen now?
Hence, up front. Longer term its more likely to see reduced cost.
As Cortan and Johnny said, PC's have a higher entry cost but a lower long-term cost courtesy of Humble Bundle, Steam sales, and discounts at places like Green Man Gaming and Great Old Games.
Just remember that the cost of the tower is only part of the entry cost - you also need a monitor (assuming you don't have one), a decent mouse and keyboard, and a headset of some kind. That can easily set you back a pretty penny.
I vote PC. Especially if you download Steam for it as well. There are some excellent games out there for PCs right now; I have to say I'm impressed. While PS4 and XBox One have some cool games, I've just seen a lot of sequels and rehashes for those consoles. Nothing original like what I've been seeing with PC.