Sony boss hints at PlayStation 4

Sony has dropped the biggest hint yet that the successor to the PlayStation 3 - let's call it the PlayStation 4 for the sake of argument - is currently in development.

Sony's executive vice president and chief financial officer Masaru Kato let slip that work on the next-generation games console was coming along nicely during a conference call in which he was asked to explain a spike in the company's research and development costs.

"For the home equipment the PS3 still has a product life," he said according to Eurogamer, "but this is a platform business, so for the future platform - when we'll be introducing what product I cannot discuss that - but our development work is already under way, so the costs are incurred there."

Until today Sony has remained tight-lipped about any future hardware, sticking to its projected ten-year lifespan for the PS3.

Microsoft is rumoured to be punting prototypes of the next Xbox offering to developers right now and Nintendo is expected to unveil the Wii 2, currently code-named Project Café, within weeks, probably at E3.

As the PS4's technical specifications are pretty much anyone's guess at present, feel free to put your wish-list in the comments section below.