The realisation the Wallabies are a little closer behind than they're used to could be the wake-up call the All Blacks need heading into the World Cup.
"They've had a pretty easy trot against the Wallabies in the last decade so maybe the next few times they play against each other the All Blacks will be a little more alive [off the back of their loss]," Kearns said.
"I think, if anything, it may be the loss they had to have leading into the World Cup. It could be a good thing."
Straight-talking Kearns came under fire earlier this year for his one-eyed commentary on a Super Rugy semifinal, when he blamed referee Craig Joubert for the Waratah's loss against the Highlanders.
Fans and players alike never know what to expect from Wallabies coach Michael Cheika, Kearns said.
"It's a lottery with Michael Cheika, isn't it? You never know what team he's going to pick and it could be completely different from last week. Who knows what's going to be in store for us?"