It's definitely overkill if you're just shooting for 1920x1080 and 30-60 FPS.
A decent entry level PC should be able to get that level of performance pretty easily (oh and it also does everything else ever that a PC can do).
PC games are also way, way cheaper so if people are willing to get over that initial barrier of entry for a machine that literally does everything, a person can spend far less on games and on gaming in general.
I'm also pretty defensive of PC gaming because I'm not seeing a port of Europa Universalis IV being announced for consoles with a mouse accessory.
Now things might be a bit unbalanced price wise for PC gaming this year depending on what PS4 games look like so if someone was looking to choose between PC gaming and the PS4, I'd say wait just to see what happens.
Ya, Paradox Games (and 4X games in general) Mobas/RTS; and the freedom to mod the Bethesda games are much more responsible for my PC douchiness than anything else.