I believe human nature takes its course.
Initially, there were scare levels equivalent to the return of The Black Death, with the public convinced that we were heading for a wipeout of civilisation.
The lockdowns were advised to us as a preventative measure to avoid the 'overload' of the NHS, which has clearly been avoided by some considerable margin.
Now, as time passes, the deaths from the virus settle down to similar deaths from flu, in broad terms, affecting the elderly and those with underlying health issues.
In the same way that flu has become assimilated into our culture - nasty but we can get along with it, the virus warnings are losing their impact.
The vast majority of people have neither caught the virus, or know anyone who has, and that means that people are less inclined to run their lives and work around it.
The tipping point where lockdown would mean unrecoverable damage to the economy has been reached and passed, and the world is slowly getting back to normal.
Closure of airports and compulsory mask wearing are seen for what they are, horse / stable door interfaces, and will fade away in the near future.
Humanity likes normality, and it will obtain it, with our without its governments' influence.