A. Consoles are just more fun. The UI looks better and the control schemes are generally better (controllers are simply more fun to use than mouse/keyboard).
B. The games are cheaper. Not too long ago I strolled into Book-Off and bought a Dynasty Warriors game for ¥108. I'm pretty sure I've never seen anything that cheap on PC before. Sure, PC is typically cheaper for "new" games, but with the used market consoles are definitely cheaper.
C. They're easier to connect things to. Much easier to plug into my TV, they don't take up anywhere near as much space as PC and I don't have to disconnect them from my monitor, remove them from my desk, lug them over to the TV and then plug them in, they're just always plugged in by default. Thus they're also easier to use for Netflix etc. Plus the amount of hoops I had to jump through to get my DS4 to work on the PC version of Halo MCC...
D. They can be used for DVDs. My PC doesn't have a disc drive so I can't watch DVDs on it, my PS4 has one though!
E. I can multitask if I own both. Play a game simultaneously on console and PC, can't do that if I only have a PC.
Bet Shiken that COD would outsell Battlefield in 2018. http://gamrconnect.vgchartz.com/post.php?id=8749702