Sony has finally acknowledged that it is indeed building a more powerful version of the PlayStation 4, as Kotaku first reported
in March. PlayStation chief Andrew House told the Financial Times that the codenamed Neo is “intended to sit alongside and complement the standard PS4″ and that “”We will be selling both [versions] through the life cycle.” The console will not be shown at E3.
Source: Kotaku – Sony Confirms PlayStation 4.5, Says More Powerful Console Won’t Be At E3