Sony has demanded that all upcoming Playstation 4 games must be compatible with the PS Vita's Remote Play feature.
Remote play capability was introduced by the Playstation 3 with the PSP but only worked on a small number of titles.
A source familiar fith the matter told Eurogamer's Digital Foundry that unless the game needs hardware specific to the Playstation 4, like the console's stereoscopic camera, then everything released must be playable from Sony's latest handheld device.
Remote Play is a feature that was introduced with the original PSP in relation to Playstation 3 titles, but it did not support a significant part of the console's library. The system used on the Playstation 4 to play titles remotely on the Vita will however be different as it will involve the streaming technology from Gaikai mentioned in the console's launch event.
The method used by the Playstation 4 will downscale the screen image using a built in h.264 video encoder which is then transmitted via WiFi. Games streamed in this way should only be affected in terms of image quality, an issue which can be improved with higher bandwidth.
The PS Vita was released at the end of 2011 in Japan and released to most other territories in February 2012. As of June 2012, the Vita had sold 2.2 million units worldwide.
At release, its most significant criticism was concerning price and viability, considering the saturation of the market with Nintendo's more successful DS successors and the rise of gaming-capable smartphones with accompanying strong digital marketplaces.