NVIDIA continues to push the envelope on gaming graphics. There are barely any Tegra 4 devices launched just yet, but they are already showing off their next generation Tegra 5/"Logan" technology. They made it clear that they have figured out how to bring their famous desktop PC Kepler architecture to mobile chipsets. This is the same technology used in their Titan graphics card, only it is shrunk and tweaked to work for mobile devices.
Besides bringing the incredible graphics prowess to mobile devices, they were also able to make stunning achievements in power efficiency. The Kepler series of graphics cards in desktop PCs are the GeForce GTX 600 & 700, and usually require up to 250 watts of power. The new 28 nanometer Kepler for mobile can display amazing graphics (relatively speaking) with only 2-3 watts of power.
To be clear, the Kepler architecture for mobile does not look as good as its desktop PC counterpart; however, it's graphical fidelity and capabilities far exceed anything else out there in the mobile world. Just take a peek at the two videos above and you will get a glimpse of what the future of mobile gaming holds.
You can see more here at NVIDIA's blog: NVIDIA Brings Kepler, World?s Most Advanced Graphics Architecture, to Mobile Devices