This may have been in the works for a while. Internally it could have been called Yosemite for years, and marketing probably didn't see a conflict as Yosemite is a pretty consumer name.
It'll be interesting to see the devices that come out of this, sort of a standardized blade server.
I'm still looking for the PoE powered version of this for a small cluster, having a single connection for power and data. Dual NICs would give you ~50W to work with, so it would need something a lot less than the 65W TDP just for the chip. It's also discouraging to see that they tried (and ruled out) the SoCs currently on the market - I'm looking for one of those as well, something that can at least compete with the performance of my 6-year-old desktop processor.
There's plenty of Avoton stuff on the market if that's what you want. I haven't seen motherboards running off POE, but you may be able to use an extractor and then step down to 12V.