During the NATO bombing of Serbia 20+ years ago, for us, teens, life was never better - no school, no work, parents worrying about basic stuff (i.e. not us) - just plenty of outside socializing and random activity. Everybody remembers that as good old times :)
I can imagine the same to be true now, not to that extent.
My general feeling (which includes my own family's behavior) is that people have returned to hanging out with whoever they used to. They just don't go to restaurants or other social settings to do it.
There aren't "organized" activities, but I see kids out playing on my street every single evening.
Honestly it's refreshing to see kids behaving organically for once instead of their parents shuttling them from one activity to the next.
I suppose the impact probably also depends on age and the number of siblings.
We've got three that are two years apart and preschool aged. They were able to entertain each other pretty well through it all.
I could see it being a much bigger issue for only children or kids that have a bigger age gap between them.
I used to work with a guy at British Telecom who had been in the under 21 national football squad of one of the waring nations - he was drafted and lost his lower leg to a mine.
He was medevac'd to the UK and with support from a local business man did a degree at Manchester I think