in Line with what a PP has suggested, things that will be unacceptable are the things todays tweens and teens find unacceptable, so:
trans people will be accepted without comment, as will gender fluidity.
environmental issues - kids are very concerned about the use of plastics, fossil fuels etc and restrictions will be coming on their use
greater automation and novel or portfolio careers - people won’t stay in one type of work for life, but have a range of jobs (many of which we won’t be able to imagine right now). The idea of a ‘job for life’ will feel wired and outdated. Doing mania jobs ourselves (like driving, cooking or farming)
will few old fashioned.
gender politics - traditional male / female roles will continue to be eroded and equality will continue to increase
food - meat consumption will continue to fall and we will wonder why we ever thought we needed to eat meat daily
high street retail will continue to decline as more and more things get shifted online, but central districts will more more to become leisure spaces as places to meet people / do stuff.
i actually think it’s going to be quite exciting (except I will miss shopping in town, a great pleasure of my youth lol!!)