We have it on good authority, from Captain Obvious, that Sony have got this one in the bag. Not only did they get chants of "So-ny, So-ny, So-ny" from the crowds when they announced their liberal approach to used-game sales, but they also undercut Microsoft on price by $100 / £80. Psychologically, that's a big advantage for the PS4.
It's too early to call the overall 'winner' of the next-generation. After all, Sony had a disastrous start with PS3, but ended up selling the same--if not more--consoles than Microsoft. A u-turn on DRM and game sharing could see the Xbox One come back into favour, quickly.
Want to see just how lop-sided the numbers are the moment? This Amazon Facebook poll is startling.