Sony can ill afford to spend lots of money developing a PS4, due to its current financial position. Development costs are not included in the financial statements. The PS3 development costs were costly to Sony. A PS4 if it even does happen will have to wait for at least 4 or 5 years before it is launched.
The specifications of the PS4 is any one's guess and noone can accurately see 5 years into the future.







