The game, scheduled for release in the second half of next year (for PS3, Xbox 360, and PC), will feature younger prince than previous trilogy saw and will serve as a prequel to those titles and the start to a new trilogy (the second title scheduled to come out in summer 2009 to capitalize on the release of The Sands of Time feature film). Stylistically and gameplay-wise, the game has abandoned the dark edginess of the last two titles in favor a fantastical cross between The Sands of Time, Ico and Zelda.
UPDATE #1: Thank you, GameSpot. And these screens are from an early version of the game (this is why they look like crap), not anything final. But what is depicted (the Prince and a mysterious female character working together and being proximate) in the screens should end up in the final game.
UPDATE #2: Hey there, Ubisoft and subsidiaries.
UPDATE #3: I put Prince of Persia 4/0/Ghosts of the Past because I've seen the title referred to as either Prince of Persia 4, Prince of Persia 0/Zero, or Prince of Persia: Ghosts of the Past. However, I have not seen Prince of Persia 4: Ghosts of the Past. I use slashes as stylistic device to refer to alternates without rewriting the same thing multiple times.
UPDATE #5: The second game is looking like it will not coincide with the film. Sorry Wired, I don't really say anywhere that Ghosts of the Past is a definite title and I even note that above. I have replaced blurry versions with non-blurry ones (that will be probably be viewed as uglier) and the screens are from way back in the year 2006.
UPDATE #6: Ubisoft Quebec City is working on a Wii version of some sorts.