Exactly, holidays are the headline issue, but the concerns go much deeper. I personally predict that if restrictions appear to be worse than last year, even with the vaccine rollout, there will be a massive collapse in compliance.
Boiling frog. At some point even those not paying much attention will realise they are never going to be let out of the pot unless they take the leap themselves.
Until recently most people seem to have unfortunately been satisfied by the idea that this will end 'soon' - in three weeks, when the NHS is no longer 'overwhelmed', in 12 weeks, by November, by Christmas, by Easter, by late spring, once the most vulnerable have been vaccinated, when everyone over 70 has been vaccinated, when everyone over 50 has been vaccinated..........
Over the last few weeks that has morphed into 'we'll have to keep doing this for a while yet' but there is *no* endgame anymore. People are starting to notice this, and the summer holiday thing and the '10 years in prison' will hopefully finally give us a turning point.