I was reading about Live-Aid, the 1985 benefit concert. There were two concerts held simultaneously, one in Wembley Stadium in the UK and one is Philadelphia.
It was originally planned to have David Bowie and Mick Jagger sing a duet while Bowie was in London and Jagger in Philadelphia. The time lag was the main reason this venture wouldn’t work.
Fast forward some 30 years and technology is much faster and more reliable. Could such a duet be held now without major problems?