He worked on a few X projects and had some free reign to push next gen ideas. Delay tolerant networking is the one I interacted with the most, as well as Google Loon, if you recall that.
Contract-graph routing (a core part of dtn - where do you send packets when there are delays in your route graph) was spec'd to be used, and I believe they may have done an experiment. The balloons had schedules or predictable winds, and satellites come and go (at least back then), so forwarding packets to the right carrier (or two) to get the next hop home was a big part of it.