It seems the ever pointless 1080p 60FPS 'issue' has taken a step further into the ridiculous...
California man sues Sony over Killzone Shadowfall
The lawsuit is being filed in Northern California by a man named Douglas Ladore. Ladore’s claim is simple: Sony advertised the PlayStation 4 launch title Killzone: Shadow Fall as running in 1080p resolution, but instead “used a shortcut that was supposed to provide ‘subjectively similar’ results," particularly in multiplayer.
Shadow Fall uses a horizontal interlace, with every other column of pixels generated using a temporal upscale - in effect, information from previously rendered frames is used to plug the gaps. The fact that few have actually noticed that any upscale at all is in place speaks to its quality, and we can almost certainly assume that this effect is not cheap from a computational perspective. However, at the same time it also confirms that a massive reduction in fill-rate isn't a guaranteed dead cert for hitting 60fps.
Such an explanation was not enough for Ladore, who is purportedly suing Sony Computer Entertainment for more than $5 million for false advertisement, amongst other charges.