Sony might be working on a new console.

That's despite the success of the PlayStation 4, which has sold more than 35 million units in under three years.

Consoles are usually released every six to seven years and a new console would be more of an update to the existing PS4, which has been referred to as "PS4.5".

Newsbeat has contacted Sony but it would only say that "this story is based on rumour and speculation rather than anything having been announced".

According to Kotaku, Sony has already started briefing developers on making games for the new console.

Kotaku says it has spoken to several developers who mentioned increased processing power and mentioned both virtual reality and 4K support.

It could mean a more powerful PlayStation.

The PS4 doesn't support 4K resolution in games, so as more 4K TVs are released that could be one reason for the added horsepower.

4K support would mean a significant upgrade though. It's around four times the current maximum resolution of 1080p.

Virtual reality

One possible reason for an upgrade would be better integration with the range of VR units that are due for release this year, including Sony's own PlayStation VR.

There's no official word on how much PlayStation VR will cost or when it will be available to buy at the moment but the first of Facebook's Oculus Rift headsets were delivered on 28 March and cost around £500.

Consoles imitating PC gaming?

The last time a developer released a significant upgrade to a console's power was when Nintendo's N64 Expansion Pak.

The cartridge plugged into your N64 console and added a whole extra 4 megabytes of RAM - allowing developers to make games with better graphics.

That was in 1998, so it's safe to say it's fairly unusual for mid-season hardware upgrades.

However, PC gamers tend to be much more familiar with replacing graphics cards, upgrading their RAM or building a whole new rig from scratch.

Perhaps Sony is looking to combat a rising challenge from PC gaming?

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