Most interesting in terms of content was that Satya confirmed for the umpteenth time what I've been saying (or at least interpreting him saying) for months, namely that it's not about sales and marketshare at this point in time, it's about providing a continuity of OS and applications across all form factors - if one part of the continuum is missing then it's not, by definition, complete, and Windows 10 isn't 'universal' after all.
Here's one salient quote from the interview, all of which is embedded below:
"I think we do ourselves a disservice if we measure our success by just looking at what's the market share of HoloLens? What's the market share of Xbox? What's the market share of PCs? What's the market share of our phones? Go back to what I said about the mobility of experience. If you think of this more like a graph, these devices are all nodes. Sometimes the user will use all of these devices, sometimes they'll use only one or two of our devices and some other platforms - so be it. But we want to make sure that we are completing the experience across all of these devices."
So no need to panic about Windows 10 Mobile being terminated, it's clear that Nadella isn't watching the bottom line and worrying at this point, he simply wants Windows 10 available everywhere, whether sales of a device are a million or ten million or a hundred million.
Here's the full interview, do have fun panning around while it's playing - you may need to watch it several times!