NVIDIA's upcoming Tegra 4 SoC chips will start shipping to device manufacturers starting in July. In the latest conference call with financial analysts it became clear that shipments will start in the second quarter of fiscal year 2014, as confusing as that might sound it means that Tegra 4 will ship somewhere in July 2013. That also means that you will not be seeing an Tegra 4 based tablets until August/September really. The biggest focus for Tegra 4 is on the the GPU side of things, whereas the ODMs really want to see more overall processor performance. As such the speculations are that Tegra 4 is not being ordered as expected.  The Tegra 4 chip is a quad core Cortex A15 chip packed with 72 GPU cores.

Tegra 4 (codename Wayne) will be a quad-core Cortex-A15 (with a fifth, low-power companion core), with a 72-core GPU — six times more than Tegra 3.The Tegra 4 SoC would get a six-fold of graphics processing power compared to the current generation, 72 Shader processors. It doesn't stop there though. Tegra 4 will apparently be capable of outputting 1080p @ 120Hz, full hardware encode/decode for video up to 2560×1440 (1440p), and a maximum output resolution of 3820×2160 (4K).

The GPU is assisted by a four core Cortex A15 processor and an additional small energy efficient core based on Cortex A7.  Interesting stuff, the chip is to be made on a 28nm HPL process.