And you will see the angels surrounding the Throne, exalting [Allāh] with praise of their Lord. And it will be judged between them in truth, and it will be said, "[All] praise to Allāh, Lord of the worlds."
(And they will be judged) meaning, all of creation.
بِالْحَقِّ
(with truth.) Then He says:
وَقِيلَ الْحَمْدُ لِلَّهِ رَبِّ الْعَـلَمِينَ
(And it will be said, "All the praises and thanks be to Allah, the Lord of all that exits.") meaning, all of creation, whether animate or inanimate, will speak words of praise to Allah, the Lord of all that exists, for His wisdom and justice. These words are not attributed to any specific speaker, which indicates that the whole of creation will testify to His praise. Qatadah said, "Allah began His creation with praise, as He said,
(And they will be judged with truth. And it will be said, "All the praises and thanks be to Allah, the Lord of all that exists.")."
Ma'arif al-Qur'an
Mufti Muhammad ShafiOn ayahs 74–75
In verse 74, it was said: نَتَبَوَّأُ مِنَ الْجَنَّةِ حَيْثُ نَشَاءُ (we can dwell anywhere we wish in Jannah). The sense is that, apart from their own special dwelling places, the people of Jannah will be allowed to visit others there and take pleasure trips around. Tabarani, Abu Nu'aym and Diya', have reported, through a chain rated as 'hasan', from Sayyidah ` A'ishah ؓ that someone came to the Holy Prophet ﷺ and said to him, 'ya rasulAllah, I love you so much that I keep thinking of you even when I go back home and I remain uncomfortable and impatient until I return to you. But, when I remember my death and remember your death, then, it occurs to me that you will be in the higher stations of Jannah and even if I reach there somehow, it is certain that I shall be on a level much below it. My worry is: How am I going to see you?' The Holy Prophet ﷺ heard what he said, but he remained silent until came the angel, Jibra'il with the following verse:
Those who enter Paradise will be such as are God-fearing. If a man discovers the Majesty of God in such a way that he loses the sense of his own greatness, then the natural result of this will be that he will start fearing God. The realisation of his own humbleness vis à vis God’s Powers makes him cautious and fearful. He will become extremely wary in matters concerning God. He will always worry as to how God will treat him in the Hereafter. Those who in this way were ever cautious and fearful in this world will be the ones who will be entitled to the fear-free life of the Hereafter. The people of Paradise will be given the same treatment in the Hereafter as royal guests receive in this world. They will be escorted to their dwellings with utmost honour. When they see Paradise with their own eyes, they will spontaneously utter words of praise and gratitude for God. In Paradise they will not only have grand dwellings but there will also be no restriction on how they divert themselves or socialize. They will be able to move about and make contact with others as they please. The Being who deserves all praises is the Being of God. But in the present world of trial the ‘hymns’ of God are not expressed in the real sense. The Hereafter will be the occasion for a full revelation of the praises of God. At this time the praises of God will be upon every tongue and the atmosphere will resound with hymns praising the Creator. All false greatness will come to an end. There will be only that Being there whose name will be worth taking. There will be only One Greatness in which one may become immersed and whose praises will be recited.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.