I see a little truth in both your thoughts, @kireek and @eiryl.
-we will be a less social society, but not with logic behind it. You'll still unquestionably hug your family/friends because for some reason knowing someone's name makes them safe in people's eyes...but will fear even eye contact with someone you don't know.
-just as a "new reality" was created in travel post-9/11, there will be some things that become the new normal...and I do think delivery services for things such as groceries will become much more popular, and Amazon will gain at least a short-term bump (at least a year).
-the changes in stadium seating was a very interesting thought. The at-home experience for sports has already superseded the in-stadium one, outside of nostalgia of famous locales. The modern stadium even struggles to create a memorable stadium experience. It takes things like Grandpa's stories of Wrigley Field or The Horseshoe or Yankee Stadium....no one will care to go to the newest corporately named building, they barely do already :)
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NOTHING will be done regarding the homeless. It won't be seen as a great social benefit, it'll be seen as something we can't fund due to all the catastrophic effects on the economy and infrastructure.
-increased working from home probably sticks around. Businesses will be looking for ways to cut costs, and office space would be a less painful and less public-arousing way to do it. So you'll have the combined argument for it of health safety and cost. Makes one wonder about schools. The classroom experience is vital to that learning process, but its going to be difficult to do so, in particular for scholastic sports, PE, arts/music classes- places where there are larger numbers in enclosed areas combined with increased contamination chances....think about a band room full of 70 woodwind and brass players breathing deeply, emptying spit valves, soaking reeds...its a freakin petri dish.
-I can see a drive for more self-sustaining countries, and less of a reliance on a global market...until people start realizing how much that will cost. But it will be interesting to see how much clamouring there will be for blackballing of China- again until the world sees they can't afford it.
Changes? I'm sure. How much actually becomes permanent changes? No way to know for sure yet. I do find it interesting that in 10 pages its gone from "not as bad as the flu" to "permanent changes to our way of life".