Of course the best use of VAR in 2006 would have been the Neill penalty. The ref (Cantelayo) must have been horrified at his own actions for sending off (rightly) the Italian player. He would have been aware that, just like the teams, it's a Darwinian Struggle to stay in the tournament for the refs. Fewer are needed as teams are knocked out, and he would have been worried about upsetting the Italians.
So when Grosso took two extra steps to change direction and then left a trailing leg to fall over Lucas's prone body, Cantelayo must have been thinking: "Gracias senor Neill! Gracias!" before blowing for a ridiculous penalty.
We would have won that game in extra time.