Sources claim photo showing touchscreen control is genuine
Console giant may unveil next-gen system on February 20th
Source says PS4 is based on an AMD processor and will have an optical disc drive
Next-Gen console to feature custom Radeon HD 7670 and AMD quad core processor with integrated graphics chip
Rumours of the so-called Sony Orbis project gather pace
PlayStation 4 allegedly codenamed Orbis; System to use AMD GPU and CPU combo
