As presented to us in the Lectionary, the reading does not give us the full context of John's prefatory vision. It only shows us the Lamb being worshiped by the celestial beings in heaven. Perhaps the intent is to invite us to reflect a little about how we ourselves offer our worship and honor to the risen Christ here on earth. If one were to ask a random sample of people what prayer is, most of them would probably answer that it is talking to God. If you pressed a little further, they would probably say that prayer is talking to God to ask Him for things.
Prayer is much more than that.
God is not a kind of rich uncle, approached only when we need something. To be sure, God wants us to acknowledge our needs in His presence, but He also wants us to acknowledge our sinfulness and our unworthiness of His love and care. Even more than that, God wants us to keep ourselves attentive to all the wonderful things that He has done for us in the past and continues to do for us with each passing minute. We can never run out of things to be grateful for. But perhaps most important for our prayer life is the prayer of praise, the acknowledgment of the greatness and the excellence of God.