Sony surprised everyone when it announced two brand new consoles last week - the revamp of the classic PS4 and a brand new PS4 Pro.

It's a bit of a first for console makers, because Microsoft is doing it too of course with the Xbox Project Scorpio, since it's usually a six or seven year life cycle for a new console.

But thanks to significant technology advancements embraced by PC gaming, Sony and Microsoft have had to up their game.

Related: PS4 Slim vs PS4 Pro - Skinny or 4K?

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However, it may well be that Sony is going one step further, and is simply testing the water with the PS4 Pro.

Speaking to Digital Spy at Tokyo Game Show, Masayasu Ito - EVP Hardware Engineering - refused to completely rule out a fully upgradable PS4.

"It's not currently planned - but this is the first time we're releasing a console mid-lifecycle, so we want to release and then see the reaction of core gamers," Ito-san told us.

When pressed further, Ito-san merely added: "We're not in a position to comment on that right now."

Curiouser and curiouser.

The PS4 Pro is coming out in November and although it isn't fully upgradable, it does come with much better specs than the original PS4, as well as support for 4K and HDR gaming.

It retails for just £349, but if you head to Game you can trade in your original PS4 and get a PS4 Pro for just £175.

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