Metal Gear Solid: Peace Walker. Since the inception of the medium, games have largely been bound to a specific device. "Gamers should be able to take the experience with them in their living rooms, on the go, when they travel -- wherever they are and whenever they want to play. It should be the same software and the same experience," he said, according to Reuters.
As with movies and music, consumers have come to expect increased portability with their media. Whereas a decade ago, movies were largely viewed at home, now they can be watched on a computer, in a car, or even on a phone. Even now, Sony and Apple are offering some cross-platform gaming opportunities, with interoperability between the PSP and PS3, iPhone and iPad.
With the advent of cloud computing services, like OnLive and Gaikai, it seems we may not be too far off from Kojima's predicted future. Until then, though, you'll only be able to play Kojima's latest game on one platform -- the PSP.