We've seen Sony SimulView in action before -- the system was first unveiled on Sony's tiny 24-inch PlayStation 3D Display back at E3 2011 -- but never quite like this. An 84-inch 4K LED Sony television at CES 2013 upscaled Polyphony Digital's Gran Turismo 5 to 4K resolution, but instead of employing said resolution for graphics, it was used to deliver two full HD images to two separate players. Those two separate HD feeds are then pumped into the same screen, which can be viewed fully independently by two separate people wearing polarized glasses, all at the same time.

Did we lose you? Let's break it down: since 4K TV delivers twice the number of lines vertically as well as horizontally, the television is upscaling GT5's HD visuals by double. Rather than employing those lavish numbers on single player, the duty's divided between each player's video feed, allowing two-player gaming all on one screen. The two images are then overlaid, a la 3D, resulting in a simultaneous feed that looks crazy until you put on polarized glasses. Once you're wearing those glasses, though, you only see one of the two feeds in full HD. It's ... it's kinda messed up. The system is incredibly impressive, but boy is it weird how effectively it works. Even better, it works without the game developer having to actually do anything (other than making a 3D-enabled game, that is) -- the splitting is handled by the television rather than the software. It's similar to systems that LG has in Dual Play and Samsung has in Multi-View, and it's not exactly brand new, but it's as impressive as ever. We've captured a variety of stills and dropped a video after the break showing the system in action, should you wish to join in our amazement.

Sony Simulview with Gran Turismo 5 hands-on

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Mat Smith contributed to this report.

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Sony SimulView gets even more bananas in 4K, we go eyes-on