Obviously, you're entitled to your own opinion, and if you don't want one, don't get one. I, however, will be, and for the following reasons:
1. I just prefer the atmosphere of being able to sit down on the couch and relax by playing a game. I never felt like that with a PC.
2. Local multiplayer. Say what you will about CoD, but it's great fun when you have 3 friends around playing a team deathmatch against some bots and seeing who can get the most kills. Plus, games like PS All-Stars, Super Smash Bros, Mario Kart, LittleBigPlanet, Rayman Origins...they just don't exist on PC, at least not like on console, because if you wanna play multiplayer on a pc, generally everyone has to have their own device.
3. The exclusives. Sony and Nintendo both have great exclusives out there that I just wouldn't want to miss out on. I'm sure the same is true for PC, and this isn't a "consoles are better than PC" argument, but they personally justify the purchase of a new console for me.
4. With few exceptions, when I run a game on a console, I know it'll work. I don't have to worry about whether my console is good enough to play it.
These are all based on my experiences with current gen consoles, but I think they'll apply to next gen consoles too. Plus, I don't care if they're less powerful than a pc. There are plenty of huge, beautiful games this gen, and I think there will be next gen too. Did anyone look at Red Dead Redemption and think "you know, I wish my console had more processing power"?. I doubt it, because it was amazing anyway. Dark Souls, Assassin's Creed, Bioshock Infinite...they all looked wonderful, and I don't think consoles need a great deal more processing power. I mean, they're getting more, and I'm excited to see what they do with it, but ultimately I don't really care if they're less powerful than PC.
Mainly, though, the point of consoles, and new ones especially, is new games. Killzone: Shadow Fall, the Witness, Infamous: Second Son, Knack, Ryse, Pikmin 3, the New Super Smash Bros...are you honestly not excited for them, or any other new games that've been announced for the Wii-U, PS4, and Xbox One? It's fine if you aren't, but I am, and plenty of other people are too. That's the point of these new consoles; new games.