Some of us think that if we only saw a miracle or a definite sign, then they would believe in Jesus. But Jesus says in John 20:29 that we are blessed if we believe without seeing!
We all have the proof needed in the words written within the Bible or the testimony of existing believers or even in the world around us. Therefore, do you think that a physical appearance would make Jesus any more real to us, than He already is now?
We are called to live by faith and not be sight. Faith is in the things that we know, regarding the hope of what is to come.
Thomas wanted Jesus’ physical presence but Gods plan is wiser. He does not limit himself to one physical body because He wants to be present with you and all believers, at all times.