Sony has done a great job in reducing the size and cost of the PlayStation 3. But did you know that Sony was thinking of making the PS3 Slim even smaller? Namely, replacing the hard drive with an alternative. One solution was replacing the hard drive with flash memory, which would not only reduce the size of the console, it would also noise and running costs.
Another was to leave local storage out of the equation altogether, and instead rely on the PlayStation Network to save all of a user’s game data, personal files and settings. In an interview with Nikkei, SCE’s Masayuki Chatani says Sony “considered both options”, but in the end, “felt that the price would be too high for the amount of storage capacity the PS3 needs”, so they stuck with a conventional HDD.
The PS3 Slim can still be made smaller, while keeping the hard drive intact. Like the PS2 Slim, the power supply within the console can made external, but this reduces portability.
i bet this would happen later with more improved stuff , maybe a couple of years later