Reports that Sony is working on a more powerful PlayStation 4 are true, according Digital Foundry. The publication states it has independently verified a report published on March 18, which said the new version of the console will have an upgraded GPU.
According to the site, Sony's R&D labs have prototyped the device, which "more than once source" referred to as PlayStation 4K. It continues, however, to explain that although the hardware offers more graphics processing power, it is not enough to deliver a robust 4K gaming experience.
Digital Foundry posits that although the machine may be capable of playing "high-definition media" and some technical aspects of 4K spec gaming, such as high dynamic range, the hardware upgrade currently isn't significant enough to constitute a full step into 4K gaming.