What worries me is that certain activities such as tourism will be regarded as bnon essential and we will be encouraged to 'staycate'. That would be a shame.
It does seem like an unnecessarily authoritarian step, to clamp down on international tourism, and potentially even preventing immigrants returning to their home country to see friends/family etc.
But governments always seem to find "solutions" that hurt the ordinary person rather than the rich elite, who doubtless will still be able to freely fly around in their private jets by paying for some kind of special (and very expensive) permit to circumvent the rules.
Flying, and transport in general, is just one contribution to CO2 emissions. There are plenty of others yet people seem to want to pick on transport as an "unnecessary luxury".
I do worry sometimes that highly authoritarian "solutions" to world problems are seen as increasingly politically acceptable, the mantra being "you accepted lockdown, so you'll accept anything". One of the things which defines the politics of the 2020s for me (along with bad government, austerity, anti-wokeism, and xenophobia) is hair-shirted puritanism, and that enjoying life, in general, is an unaffordable luxury.
Don't get me wrong, climate change is a big concern, but there are surely other solutions than harsh and extreme measures. I've even seriously seen articles saying that you shouldn't own a cat or dog because of their contribution to CO2 emissions; surely that is just a little bit too far.