>>In the UK land costs dictate high density housing, even rural new build housing estates (rare as hens teeth) now come with teeny tiny gardens, tiny rooms and no storage space. Your change to distributed living might work in countries with wide open spaces but not in North West Europe.

My personal experience is that when land became too expensive in Basle in Switzerland, pharma employees moved across the border into France. There was a property boom in St Louis followed by gradual ripples further into France, especially along the rail lines. Meanwhile the Basle/Freiburg airport also was built across the border in France because that made better logistic and financial sense. IOW costs associated with proximity or national residence can be overcome as long as there is cheap reliable transport. In the above cases it was the efficiency of Swiss railways and excellent freeways in France that made it possible but as those become clogged, air freeways are the next step. Assuming that physical presence in London matters for your work, IMHO within a decade or two you'll be able to live across the channel if you feel like it. Might pay to buy some "useless" waterfront land over there while it's still cheap. ;-)

>>Also on the parcel delivery front. Imagine a van delivering for Amazon has 150 parcels. Thats 150 drone flights. I regularly see multiple delivery vans pass my house every day so potentially hundreds of drones. it'll never happen.

I agree that a drone free-for-all would be problematic but many thousands of small flying objects can share a square km of lateral space as long as there's protocols and co-ordination. Passenger aircraft may need as little as 300m of separation because of turbulence and other safety issues, but if you specify (say) 5m of lateral separation for drones, that still allows for 40000 drones per lateral square km. Start stacking levels and you'll be into the hundreds of thousands of drone movements.

>>A more likely future would be most of the thing you buy get 3d printed at home or a local depot for more complicated items.

Amazon has been fabulously successful at harnessing the internet followed by the mobile app to meet customer needs. I'm not yet convinced that it has it so disastrously wrong this time.