They want this, if it can be made to work, and they'll try it if they don't know. That's what they said in the goals revelations, and I believe them.
This probably can't be mentioned enough. Millions to billions of gates on a die, lots of room there. Multiplied out to the millions to billions of computers in service. That's a huge opportunity no one in their right mind wouldn't try to exploit. And RNG's are an easy place to do it. RNG is not a box you can input 2+2 test vector from the outside and get 4 back out. The RNG may even look random, pass diehard, etc. But if there's a secret seed buried in the RNG somewhere, you're screwed. And when was the last time anyone ever publicly decapped and validated a current Intel RNG CPU? <silence> Sure, mix it in with at least one other source, or shutdown, and use that. But don't ever use it raw. Embedded RNG's help make the market for external discrete logic RNG dongles.