It's quite simple really. Any new ground based story content, new ships, new mechanics, etc will be coming to PC Odyssey Owners. PC Horizons owners will probably be rolled into using the new Odyssey engine (prepare for a second does of salt about the new planetary tech) and, with Console owners, they will get 'fixes' to keep them in-line with the Odyssey content, to make sure the BGS doesn't break, powerplay stays on track, etc that kind of thing. I'd expect any space based CGs or galnet to continue because all the platforms call the same back services.
For example, if Fdev change Engineering or (if there's a miracle) they "fix" powerplay, you can expect Consoles and Horizons to be updated to keep that in line. However, the panther clipper, new thargoid content or anything else brand new, that will be Odyssey Only.
BTW, I think that's a little unfair on the CM team. At the community meet, it was obvious that there were loads of things they would want to talk to us about but they had been instructed not to by the higher ups. It's pretty obvious now that 'questions need to be resolved' was can we get Odyssey out on console and that the answer was no.