For example, being in Australia conferences in the EU and US require a 14 hour flight time and days of adjusting to a new time zone. Likewise there are people working two jobs, have children or are a carer who may want to experience the benefits of studying in person but can't.
I suspect as the fidelity gets better that human need of being around other people is going to be fulfilled. Which could make a massive difference in terms of reducing loneliness and the feeling of isolation.