Exposing an idol: will the 20th Congress be repeated in Russia?

Exactly 70 years ago, at the 20th Congress of the CPSU Central Committee, Khrushchev read a closed report exposing Stalin’s personality cult. A short “thaw” began. De-Stalinization turned out to be superficial, and today the leader is again held in high esteem. What is the historical significance of the 20th Congress? Will there be a new XX Congress after Putin's death?