The direction of this new generation will depend on the Day 1 sales numbers for the Xbone. In just a few more days, the future direction of this generation and every subsequent generation will be revealed.
If the Xbone sells less than 500,000 worldwide on Nov 22nd, you can bet your ass that SONY will engulf 90+% of the console marketshare and will be the console that every 3rd party will cater to. I expect lots of 3rd party multiplats to go exclusive. I expect KH3, FFXV, and MGS V to become PS exclusives again if the sales are too lopsided.
However, even more pressing than 3rd party exclusives is the fact that SONY will never lose their King of All Games crown ever again.