PS4 has more exclusives releasing this year than XBox One, XB1 is barren compared to PS4 for exclusives games, it's 6 exclusives on PS4 to 2 on Xbox One.
Also Sony have basically dealt with everything releasing this summer before E3, they could have left August and September release dates and new gameplay to reveal at E3, but they didn't.
There's plenty of prospects for Sony to announce at E3 and release this Holiday.
Horizon has been in development since KZ2 shipped (end of Jan 2009 to go gold for release in late Feb 2009), even if they experimented for a year after they'd be over 5 years into the project at this point, nearly 6 by the end of this year, it could easily release this Holiday.








