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(Pocket-lint) - We're big fans of the Remote Play functionality of the PlayStation 4 - being able to play PS4 games elsewhere in the house, either on a portable device or the PlayStation TV box soon to launch in the UK. However, when playing on a PS Vita's 5-inch screen, for example, it does diminish the gorgeous graphics of the new-gen games at times. PS4 games deserve the biggest screen possible.

Japanese company Gametech thinks it has the answer; a control pad with a 1024 x 600 7-inch IPS LCD screen that you insert your PS TV into and turn it into a much larger PS Vita.

The DekaVita 7 (which translates to "Huge Vita 7") has a "large-capacity" rechargeable battery that powers both the screen and the PS TV (or PS Vita TV in Japan) and a HDMI connection to take video from Sony's box. You can then access everything the PS Vita can through the large accessory, which is similar to Nintendo's Wii U GamePad in many respects.

READ: What is PS4 Remote Play and what devices does it work on?

There are caveats though. While it will work well for PS4 Remote Play, the PS TV has some compatibility issues with a large selection of PS Vita games. And it doesn't have a touchscreen, of course.

Also, at 23,000 yen (around £125) you might be better to get yourself a Sony Xperia Z3 Tablet instead, as that will also have Remote Play functionality and much more besides. Or even a second-hand Xperia Z2 Tablet - the screen will be even bigger then.

Writing by Rik Henderson.