Sony unveils PlayStation 4 games

Sony has demonstrated the PlayStation 4 console it claims is the 'future of entertainment' - but refused to show off the console itself or say when it will go on sale, or how much it will cost.

The PlayStation 4 features dramatically increased graphics power, and a new controller with a built in touchpad.

The new console was demonstrated during a two hour press conference in New York.

However, the firm came under fire for not revealing what the console looks like, with twiter users referring to the press conference as 'the great PS4 scam'.

Presenters played games that were projected on screens in a converted opera house, but the PlayStations themselves were hidden backstage.

However, the firm claimed it wanted to focus on the games at the event.

'I don't know that the box is going to be something that's going to have a dramatic impact on people's feelings about the game,' said Jack Tretton, CEO of Sony Computer Entertainment of America, the U.S.-based arm of the PlayStation business.

'It will be a color and a size fairly comparable to previous consoles,'

'There's a big story to tell here, and it's going to take between now and the holiday season to get all the details out there,' Tretton said in an interview.

Tretton said the price of the PS4 hasn't been decided yet, but hinted that it wouldn't be as high as the PlayStation 3 was initially.

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