Sony PlayStation® 4 strengths include Exclusive Content such as DLCs being released early for games such as Call Of Duty also there are exclusive games such as Uncharted 4 and The Last Of Us: Remastered. Those are bonuses included with the PlayStation® 4.
Not backwards compatible with PS3 games. This feature alone has pulled many people away from the the decision of buying the PlayStation®.
PlayStation VR could change how you use the PlayStation system. With the new virtual reality system that is believed to take over the future could lead to a whole new market in the video game world.
Xbox One, The Microsoft Xbox One is a threat to the Sony PlayStation 4 because it is also a next generation console. That can do almost the same things that the Sony PlayStation® 4 can do. They also have their own fair share of exclusive games.