I'm of two minds about this. On the one hand JuliaCon is always quite an amazing event and it's the only place I get to see a number of wonderful people that I usually only interact with online. On the other hand I'm told there's been a few thousand registrations already, so maybe this will make JuliaCon more accessible to a much wider audience, which has always been a goal. We've had live streams and recordings in past years, but I'll be interested to see how things are different with an entirely virtual event.
Given the huge level of interest in the online event this year, I am quite sure that we'll try to have more of an online component going forward, even as we move to physical events.
As someone who keeps saying "maybe I'll attend JuliaCon next year", I'm happy I'll be able to attend the virtual event this year, but I also really hope I get to attend a physical event in the future.
I just watched that talk the other day, and boy is it insightful. Julia has cracked a fairly magical combination of features. I fully expect it to replace Python over the next 10 years.