Disappointing but hardly surprising
While we know that PlayStation Move controllers will be supported by PlayStation 4, it wasn't immediately clear if the current DualShock 3 controllers would carry forward into this next console generation. According to SCE Worldwide Studios president Shuhei Yoshida, the system "doesn’t support DualShock 3."
I had a small amount of hope that with the cloud-based support for PlayStation 3 games, perhaps the gamepad would work on PS4. On the other hand, the DualShock 4 is differentiated enough that it was reasonable to expect Sony would take the opportunity to move on. And they sure did. I just hope some of you don't have a bunch of extra controllers sitting around.
Has poor Yoshida lost his voice yet? So many quotes, so little time. By the way, if you aren't following the man on Twitter, you ought to strongly consider doing so. He's a delight, even if this news wasn't.