Here it is, splayed open for examination by the FCC. At first, it reminds me of looking under the hood of a modern car—its core components are barely recognizable as such. Well, until you really tear it apart...
The first thing you see behind the screen is a somewhat baffling wall of silver and black; it's hardly the tightly compressed, carefully organized panel of circuitry and wiring you find when you crack open a smartphone.
Two reasons for that: first, in terms of hardware, this is essentially a large smartphone, so it makes sense that the components will have a bit more room to breath; second, that giant bifurcated black chunk, which obscures the rest of the internals, is all battery. More pics from the FCC rip at Engadget. UPDATE: And iFixit, for a deep-dive technical analysis.