I wondered if someone would use a CGI Artoo shot by mistake.
I hope Frank Oz enjoys a Yoda life span, but I fear an obituary would use CGI Yoda and footage of his Muppet characters with their current performers.
I think ROTJ Yoda ghost will be the most popular SW image used in that event, hopefully with Hayden cropped out.
Hopefully Hayden will have been forgotten by then.
Which brings me to this: How would we react in the event of a prequel actor dying?