First party, second party and exclusives have ALWAYS defined the image of console. Because no matter how powerful of a console you have, you cannot have those fore mentioned games on that console. And this whole "I just like third party games" to justify an Xbox One (not to say that there aren't other reasons that make the One worth the purchase) is a very sorry excuse. Easily, Sony's console (for example) offers exclusive titles that are also of the same genres as those third parties games. So you get more game, more choices.
You say that, but when I look at the top 10 games on the PS4 I only see one exclusive there (ONE!). And the second best selling exclusive falls in the 14th spot with 6.5m units sold. Which means that only 8% of the PS4 owners went out of their way to buy the SECOND BEST selling exclusive on the platform. So sorry, but it looks to me that the majority of PS4 buyers are actually playing CoD, Fifa and GTA right now.