I'm not talking about global sales; I'm talking specifically about the U.S. market--Microsoft's home turf, where the Xbox 360 beat the PS3 quite handily but where the PS4 has outsold the Xbox One for all of 2014 thus far. If the Xbox One can't even win its home market, a market where Microsoft had a huge sales advantage over Sony in the previous generation, in the month of reaching price parity, that doesn't body well. I'm worried about it because this will affect the content I will get to play on the system, a problem that will exacerbate as time goes on, if the trend continues. Xbox One could become at risk of becoming like Windows Phone--lucky to get sloppy seconds from Android's app store. We've already seen Kinect lose support (Microsoft didn't even mention the word during their E3 conference!), Xbox Entertainment Studios get axed, etc. and the console is barely over a 1/2 year old.
And as Flagz pointed out, the bias of the press, with their enamor for the PS4, has likely been fueling sales discrepancies (and has been frustrating to read).