If you are a diehard fps/tps fan get XB1. Otherwise, PS4 is the clear choice.
PC gaming is not a bad choice... but you could buy a PS4 and XB1 at their likely to be holiday prices for what you'll need to get a decent gaming PC (Be real pc guys... if he buys a PC this fall he'll want skylake + 8-16GB of DDR3 (or DDR4) + a $200-300 GPU + SSD + 80-100 MB, etc).