Interesting topic. Since Christ will have rid the planet His enemies ( unbelievers), locked up Satan and his demons, (disabling them from tempting man to sin), therefore everyone will be Christian and in harmony with God, whatever is good and true will be the only thing anyone talks about. Are there more good thi gs to kearn about reality? Absolutely. Everyone will be behaving and speaking purely, holiness will abound. The Bible will still be needed for the newborns. We will cherish it and be grateful, remembering where we came from. Babies will be born and so they will need to receive the truth, learn the Word, believe, practice, pray and worship God.
Christ's words will obviously be new and different since there will be no focus on sin and evil, and it's consequences. No emphasis on " believe in Me and you'll be saved". That will be history for all. When sin is out of the way, love and good is fully realized, reaching heights of achievement like never before, like a few prodegies do now. We'll all be prodigies. All our gifts and abilities will be fully realized. We will be physically, mentally and spiritually healthy. So teaching and focus will be only on good things. We will prosper like never before and be happy, content, but not concerned about personal gain, getting ahead, competing, winning. We will now peace like never before. Perfection in every field will be the norm when sin cannot cripple, supress and discourage.
Would there be a need to hear truth, new insights coming from Jesus? Sure, it will be reported purely - no fake news. There is so much more we can learn.
Many of us will have new resurrected bodies, but many will still have mortal bodies, and we see evidence of this by the fact that there will be procreation, newborns and death, but much longer lives. That is why after the 1000 years, there will be a 2nd resurrection.