He also revealed it will take "a couple of months" for supply levels to be able to meet demand for the console which is sold out at many retailers.
Speaking exclusively to the Express Online, Mr Gara said: "All of our major studios are working on PS4 content. These guys are experimenting with and working on the new platform.
"They may not have announced games specifically but our big studio network is focused primarily on PS4.
"Their heritage is fantastic and it is a great platform to develop for. So I am looking forward to some great surprises and amazing experiences.
"There are going to be some real gems."
Mr Gara pinpointed racing game Drive Club, action adventure inFAMOUS Second Son and shooter The Order 1886 as titles for gamers to look forward to in 2014.
He also said the eagerly anticipated sandbox game Watch Dogs and Destiny, from the creators of Halo, as games that will showcase the power of next generation consoles.
He said: "Two titles which will define what next generation gaming will look in its mature phase will be Watch Dogs and Destiny.
"These are two games we have aligned with closely and will have substantial exclusive Playstation 4 content."
A new Unchartered title has been announced recently and Mr Gara said that would be a "big" game for PS4 owners to look forward to.
The latest chapter in the best selling action series has yet to receive a release date.
The PS4 launched in the UK and went onto becoming the fastest selling console in history.
Two days after its European launch on Friday November 29 it was revealed the console had sold 2.1 million units worldwide.
Mr Gara said it was frustrating for consumers that it is difficult to get hold of a PS4 at the moment but Sony were "delighted" with the console's success.
Mr Gara added PS4 owners will see titles released next year that truly show the graphical power of the next generation console.
He said: "Gamers can look forward to seeing publishers really push the boundaries of what this great machine can do.
"Really stretching the technology a lot more than we have already seen."
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Source: http://www.express.co.uk/news/science-technology/449627/Playstation-4-PS4-owners-will-have-gems-and-great-surprises-in-2014-says-Sony-exec
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