It's not dead. It's being murdered. Microsoft, Apple, Gnome and KDE are making the experience worse with each update. Productive work becomes a chore. And the last thing we need is more experiments. We need more performance, responsiveness, consistency and less latency. Everything got worse on all 4 points for every desktop environment despite hardware getting faster by several orders of magnitude.
This also means that I heavily disagree with one of the points of the presenter. We should not use the next gen hardware to develop for the future Desktop. This is the most nonsensical thing I heard all day. We need to focus on the basics.