Sony has become the latest player to take on Apple's iPad, as the firm unveils its tablet-style computer code named S1.
The firm announced plans to release the device powered by the Android 3.0 operating system Honeycomb, along with a smaller dual-screened 5.5inch mobile device the S2 in Tokyo.
But the news comes as Sony was forced to admit hackers have accessed the personal details of millions of PlayStation Network users that may include credit card details.
Sony senior vice-president Kunimasa Suzuki said the products will go on sale worldwide from about September, reported the Associated Press. Both will be Wi-Fi and 3G/4G compatible, he said.
The devices will connect to Sony's cloud-computing based library of movies and music, Sony PlayStation video games and digital books from Sony's Reader store, said the company.
According to figures from research firm Gartner, PC sales are being hit by the popularity of tablets. Global PC sales fell by 1.1% in the first quarter of 2011 compared to the same period in 2010 - below Gartner's prediction of 3% growth.