It is getting more certain with each day that passes that Nvidia is about to release a Shield Tablet and it will be based on the new Tegra K1-soc. If you look at the website from the Global Certification Forum, there is an entry that has just been approved and that device is listed as the Shield Tablet. The Shield Tablet also was mentioned in Nvidia's own TegraZone website for a brief moment.
The Global Certification Forum certifies devices for 3g and 4g. Specs for an unreleased device called the NVIDIA Mocha were also leaked by online benchmark results in May.
They describe a system with an NVIDIA Tegra K1 processor (192 Shader cores / quad core ARM A15) and a 7.9 inch, 2048 x 1536 pixel display. The Tablet would get 2GB RAM memory and would be absed on Android 4.4.
Here's that entry, and scheck out some screenshots of early benchmark leaks and info as well.
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