Sony may have been caught in the same handheld wavelengths as Nintendo in 2010. A patent uncovered by Games Beat shows Sony considering a handheld, touchscreen device that would function similarly to Nintendo's Wii U. Titled the "Position-dependent gaming, 3-D controller, and handheld as a remote," the device would track its own location as "input to a video game" and render "an avatar on a mobile device such that it appears to overlay a competing user in the real world."
Sony's Vita can share saves and transfer data with the PS3, and even has the capability to be used as a controller for compatible PS3 games, meaning this patent could simply be a tale of what might have been. Inspect some more images of Sony's device below.