Well personally I think Sony is in a position to take the next gen easily if they don't do something abysmal. I think a lot of people are excited (honestly myself included) by the prospect. I think it's just due to all the positive momentum lately. The PS3 is selling very well, the Vita just had an upswing in Japan, the PS4 presentation went very well and the exclusives are flowing like a waterfall. PS+ is an utter bargain.
I honestly never would have seen this coming and it's far better than I imagined.
But............ I'll tell you the main reason I think Sony fans (like myself) are confident. And this will ruffle a few feathers, but I'm not ashamed because it's what I truly believe.
Nintendo are out of the race.
There I said it...... The WiiU design and sales are abysmal. I love Nintendo software, but the hardware for their home console is a distaster. With their main competitor gone I believe Sony and Microsoft will mop up the blue ocean. I do still think Microsoft has a chance to take no.1 next gen if they can strike a better balance catering for the core next gen as intensely as they tried to push kinect this gen for the casuals, but as far as I'm concerned Nintendo are gone.
I don't agree with trolling other fans though, but I will be honest in my prediction that Sony will be first, Microsoft a close second and Nintendo a distant third.