It's one of those thing we're all too close to see clearly, and I do not exempt myself from that problem, but I suspect in a hundred years it'll be one of the "big stories" told about this time period.
Where did you get that idea from?
If Scotland gains independence, it will likely remain an active partner in the European Union.
"but presumably still a Commonwealth nation" - yes, the current policy is to continue to with the current British Queen as a constitutional monarch and remain part of the Commonwealth. I myself would rather Scotland become a republic, but I can wait another few years before fighting that battle.
[1]: https://en.wikipedia.org/wiki/Countries_of_the_United_Kingdo...
If people are able to move house (all of it but the yard) with 3-4 tractor trailer trucks, things become much more fluid and state & local governments will have to adopt more citizen-friendly policies, or suffer a brain/revenue drain.
Sort of like how Detroit lost almost 60% of it's population because they drove people away with corruption and bad policies. Only now it wouldn't take 70 years to happen.
Moving house literally isn't an option anyway if you want to move from one jurisdiction to another, as it likely involves too large distances.
(We are talking about Singapore.)