Dont underestimate the power of 'comfort'. People often stay loyal to a brand(speaking beyond just gaming here) because its what they are used to and what they know.
While I am hardly the typical consumer, I have used the Xbox as my preferred system for about 12 years. Basically if a multiplatform game exist, it is 95 percent of the time bought on an Xbox platform. I prefer the XBL ecosystem and controller, hardware, etc. I am, somewhat reluctantly I will add, not planning to main the Xbox One due to the under powered hardware, the screwy DRM policies (which will get in the way of my game collecting hobby) and of course, the rumor that they will steal the 300 dollars of MS points I have tied to my account.
It's a bitter moment though, I enjoy the PS brand but it has not been my main since the PS1, so if MS can revolt someone like me who is heavily invested into the brand, I can't imagine people who primarily play maybe 5 series can't be deterred either. We saw how brand loyalty stuck with Sony after the total dominance the PS2 had along with the original Xbox being a massive flop in comparison.
As usual, being a collector means i'll own them all, but I did become quite comfortable with Xbox being my go to system, so i'm hardly as enthusiastic as some are about the hate, more like a bit sad, with that said, they deserve all the back lash they seem to be getting.