I really look forward to being able to meet with people in person in the future. I am concerned, however, that requiring "full vaccination" may unintentionally restrict attendance. Huge parts of the world still do not have vaccine availability, and so many people aren't even able to get a first dose, let alone a complete series. As well, there is a big variance between countries on what vaccines they consider "acceptable" in order to enter that country; people who are considered fully vaccinated in their home country may not be considered vaccinated at all by the receiving country. In other cases, some countries require two vaccination doses, while others are quickly moving to require three. Many countries also have requirements for rapid covid tests within a certain number of hours before arrival; those tests aren't free (and in some countries aren't even available), and that will have an effect on the ability to travel. Some countries restrict visitors from other countries entirely. In just the last 24 hours, my country's government has issued a travel advisory strongly discouraging all international travel for at least the next month with the exception of emergencies, and has considerably increased restrictions on admission to our country.
We're still in the middle of a pandemic, and the ability to (a) predict what the situation will be many months down the line and (b) ensure that we are able to provide equitable opportunities for our entire global community to participate are big question marks right now. Much as I want to see more of my colleagues in person as soon as it's safe to do so, I don't think we're anywhere near that point yet. I think planning for the next Wikimania to be virtual is the only sensible thing to do right now, since the planning needs to be done *now*.
Risker/Anne