You have to take into account that the PS4 motherboard was never built with native BC in mind, so that in itself could drastically affect the size, power output and design of the console. We don;t know how well it'd coincide with the PS4 UI either, to this day, you still can't use the XMB while playing a PS1 game on PS3, lol.
Plus the DualShock 4 (bar L2 and R2, hence Killzone Shadow Fall's new controls) lacks the pressure sensitive buttons the DualShock 3 had, so that's a headache on it's own.
Easily $500, bare minimum, and considering that the 20GB model was neglected at launch with the PS3, it'd likely give journalists the impression that the PS4 is primarily $500. Sony aren't going to risk all of that all over again to appease to an install base half the size of the PS2's.
Bet with Einsam_Delphin: http://gamrconnect.vgchartz.com/thread.php?id=172355&page=11
