NVIDIA GeForce Titan For Gaming?!

Does anyone know if there are any games out that can take advantage of the $1,000 Titan video card? I have come across it in various builds of Digital Storm PCs and was wondering who would spend this kind of money on a video card alone? I even noticed an option to SLI 4 of them together for an astounding ball breaking pricetag. It comes with 6Gb of video ram and to put it in perspective what exactly does all this power do?

i'm just trying to put this card in perspective with a $399 PlayStation 4??