I own a PS3, Xbox 360 and a gaming PC. The 360 came first and combined with Xbox Live it became my default gaming device. Probably 60% of my games are for my Xbox 360. After a few years with my 360 I bought a PS3 because there were some exclusive games I wanted to play. In 2010 Battlefield 3 came out and I built a gaming PC for it because in my opinion the Battlefield series excels when played with a keyboard, mouse and servers that can accommodate large scale battles.
A strange side affect of building that gaming PC was that I started buying games for my PC instead of my consoles because the games looked and played better on my PC then my consoles.
This next console generation is going to be the most homogenous yet. Developers will be able to make a game that works on PC, Xbox One and PS4 so easily that brand loyalty will mean a lot less.
Unless Microsoft actually releases some TV features that actually work outside of the United States I don't know if I'll be buying one of these new consoles. I'll probably continue buying games for my PC until a platform exclusive game (which are becoming increasingly rare) comes out.