In the world of technology that brings to us movies, powerpoints and virtual reality, why does God still use low tech, traditional preaching? Why can the church not transition to skits and technology to relay the gospel? Well, the world changes, but God does not.
The preacher is not just a person that stands in front of the congregation and speaks. Preachers are not motivational speakers. They are men and women of God speaking the Word of God to the church. The prophet Ezekial spoke of the preacher as a watchman on the wall...
Ezekiel 33:6 But if the watchman see the sword come, and blow not the trumpet, and the people be not warned; if the sword come, and take any person from among them, he is taken away in his iniquity; but his blood will I require at the watchman's hand.
If the preacher does not preach, God holds them accountable. What a responsibility?
The preacher is called. They are not appointed or should not voted on, but they answer the voice of God to preach the gospel. The Apostle Paul said...
1 Corinthians 9:16 For though I preach the gospel, I have nothing to glory of: for necessity is laid upon me; yea, woe is unto me, if I preach not the gospel!
The greatest reason that preaching is still absolutely necessary in the church today is because it is the intrument that God uses to convict the people.
Acts 2:37-38 KJV
 Now when they heard this , they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do?
 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
Paul further explains this when he wrote...
1 Corinthians 1:21 For after that in the wisdom of God the world by wisdom knew not God, it pleased God by the foolishness of preaching to save them that believe.
Those outside the church will consider that preaching is foolishness, but it will be the preaching that will bring conviction unto salvation. Why preaching? Because it what God chose to bring salvation unto man. Man may change, but preaching will always be effective. Isaiah wrote...
Isaiah 55:11 So shall my word be that goeth forth out of my mouth: it shall not return unto me void, but it shall accomplish that which I please, and it shall prosper in the thing whereto I sent it.
Have a Merry Christmas!