Well, as the Olympic time trial champion this was not a good performance compared to van Aert and Ganna. But it doesn't tell us much about the Tour in my opinion because we don't know at what percentage of their capabilities they all are at the moment. Vingegaard definitely wasn't stronger. And Pogacar can only beat himself at the Tour.
To win the Tour Roglic has to hope for serious bad luck for Pogacar, I think we knew that before.
The olympic TT had almost 800 meters of elevation. This one had 90. Believe it or not, this makes a big difference. A 65kg rider will always be in a disadvantage in a pan flat TT to 80kg Watt-machines. Unless you are Evenepoel. Then you are allowed to defy the laws of physics haha.