Does the opening of the the eight gates of Paradise after the remembrance following ablution occur in this world or in the Hereafter?

The aforementioned Hadith encourages performing ablution thoroughly (isbagh al-wudu). So, whoever performs ablution and does so thoroughly, then says: "I bear witness that there is no god but Allah, and that Muhammad is His servant and His Messenger," the eight gates of Paradise will be opened for him on the Day of Resurrection, and he may enter through whichever he wishes.