Or brand familiarity?
I'm used to the Xbox system and it's comfortable to me.
I like the controller a lot more. This is a big deal.
I know how to integrate my media from my PC to my Xbox, I know the limitations and how to work around them etc.
Xbox Live will probably be better than PS+, but what would I know I have no interest in PS.
I can't think of one thing that Playstation can do so well that I would consider passing on what's familiar and will please me almost guaranteed.
Even if PS4 does put out games that graphically superior, I'm not sure I care so much about that versus other features because I personally just do not care about the graphical fidelity that much. They'll all look good. I'm not a nitpicker, I just want what's comfortable to me and what reels me in.
If that's how you feel then more power to you. For me it comes down to two things that, IMO, are basically deal breakers.
1) I just like Sony more than Microsoft. Now let me explain! I know these are two faceless evil corporations that care about nothing but the bottom line, it just doesn't feel that way to me.
a) I hate (HATE) how Microsoft unveiled their games consoles. They thought it was in their best interest to tout everything except games. I couldn't stand this and I think it's a clear sign in the direction MS wants things to go.
b) I also hate the fact that Microsoft can do nothing but butcher their 1st and 2nd party developers. Bungie left because they wanted creative freedom. FASA, Ensemble, Bizarre Creations, Digital Anvil and a host of other somewhat promising developers were woefully mismanaged by MS and run into the ground. I mean, what happened to Lionhead? Sony on the other hand seems like the exact opposite. David Jaffe has said countless times that Sony stays out of your hair during development and they support projects like The Last Guardian for what, 6 years now? Sony constantly makes decisions that support game makers. Microsoft constantly mucks things up.
c) With that being said, when Microsoft does, secure a quality IP, it tends to be because they threw money at a 3rd party developer. I don't know. Perhaps I grew up watching too many Disney movies. I just associate buying art late in its development cycle to be villain-esque. I much prefer the route Sony takes in this area.
d) Kinect 2.0 is infuriating to me. I hate everything about it as a gamer. Kinect 1.0 was a disaster from a gaming perspective. Kinect 2.0 is being forced on gamers and charging us an additional $100 dollars. Not only that, but Microsoft thought it was OK to launch a $500 dollar Kinectified XBone AND NOT SUPPORT IT. Where does MS get off? It's like they're saying "Yeah, you have to pay $500 dollars because Kinect. We'll support it when we feel like it. Now give us your money."
2) The consoles themselves. It seems obvious to me that the PS4 is simply the better designed piece of hardware. It's significantly smaller. It doesn't have a power brick like the XBone. It's a little more powerful and oh yea, it's 100 dollars cheaper. It's controller also have more utility than the XBone's (swipe pad + move light).
It's also not like I've loved the chatter I've been hearing about Microsoft and it's next gen console for the past six months. The little rumors and quotes that seem to pop up on a weekly basis haven't been too flattering for MS. I can chalk those up to the typical rumor mill though.
I don't know. Just my two cents.