Sources familiar with the device tell Android Central that this is indeed an accurate representation of the upcoming Nexus tablet.
The Nexus 10 is reported to be powered by a next-gen Samsung Exynos 5 chip, with Android 4.2 Jelly Bean running on a iPad-beating 10-inch, 2560x1600 display. We'll likely learn much more about this new flagship tablet at Google's "Playground" event next Monday.