Hmmm....
First of all, I think that the human race, collectively and as individuals, are remarkably resilient and adaptable. We will adapt going forward despite the challenges that we all face. Nonetheless, we are all susceptible to not being as resilient as we hope; in recent years, talking about mental illness has become much easier (though the situation is still far from perfect) and we must all look to support those individuals, both on a one to one basis and collectively as a society.
In my opinion, this moment will be regarded as a watershed moment but not for the reasons mentioned earlier. This clarion cry against the onward creep of authoritarianism, regarding this as some means of getting the populace to acquiesce to subservience to the state is faintly ridiculous; that you can have a welter of discussion on this forum and elsewhere is testament to that. Notwithstanding that I thought the great threat in civil liberties was facial recognition so promotion of face masks seems to run contrary to that. As a society, we provide more information in terms of a digital footprint and data provision; if you don't wish to arm the authorities with information, then going off grid is the only choice! I think in Boris, you have perhaps the most libertarian PM I can recall. He's also one of the most unprincipled and inept poltical leaders in my lifetime.
The lasting changes of this period is that it has turbo-charged or promoted far faster some of the changes that were clearly happening anyway. Most visibly, this is in the field of the impact on traditional retailers who have seen trade collapse; this has been happening for the last 15-20 years and, as in any recession, the sickest firms will die. That will indelibly affect our town and city centres and especially those mid-ranking towns; Newcastle, Leeds or York have sufficient critical mass of commerce, tourism etc to shrink yet survive but not in towns like my native North East such as Darlington or Stockton on Tees. Despite the obvious direction of travel, we've seen continued retail property development when really, towns need to be shrinking their retail footprint.
The other obvious move will be in working from home. Whilst some people will want to be in the office 5 days a week, or have a job that cannot be done at home, the number of firms where home working is an option was already growing. Now we're seeing, as in my partner's firm, that WFH would never have been countenanced. Yet necessity and the march of technology means that expensive office space may no longer be required in the same amount. Undoubtedly, that impacts on public and private transport use...already noticeably quieter on a Friday before Covid. Moreover, as we've seen elsewhere, we might see unscrupulous property firms expand the conversion of redundant office buildings and the impact on social fabric.
Linked to all of this is the economic picture. All countries have experienced drops in GDP but the UK has faired much worse than almost anyone else
https://ourworldindata.org/covid-health-economy - There will undoubtedly be some bounce back but with a Brexit looming (of what particular variety, we don't know), we will have a longer way back than other countries. Whether Boris will be PM when we get to 2024 will remain to be seen; it may well be Rishi?
It would be easy to either dismiss this as merely an episode in history or to suggest it's a huge event. Both are true; the immediacy and effect felt for the generations directly impacted by it will be acutely felt. However, it may be that in 50 years' time, when most of us are dead or dying, that it has as much impact or relevancy as Spanish Flu, World Wars, the Great Depression, the oil shocks or the miners' strike.