First, I'd like to join the "thank you, Hong Kong"-choir, although it could as well be "thank you, everybody".
That done, there are some things I'd really, really like to see on next wikiconferences, wherever or whichever they'd be.
More reliable WiFi. Wikimedians are the kind of people that need more than 1 (and quite possibly more than 2) connections per people, at least one of them high-quality. I know it's not easy, but we also can't say this problem would have ever been a great surprise for anyone.
More electric sockets everyone, especially in the lecture halls. If there is nothing else, we could buy and install extension cords in bulk. I don't know about your computers, but mine kinda likes electricity. And its battery won't work eight hours in a row. Probably there are others like me. I mean, who edits Wikipedia on an abacus?
Less littering. This is a wish not for the organizers but to the participants. Most of us are perfectly able of picking up litter, even if it is not theirs. For heaven's sake, use this ability!
Otherwise, bye and thanks for all the fish.
Raul WMEE