Recently, Don Lafontaine passed away(official cause of death is yet to be confirmed). Though his name might not sound familiar to you, his voice very probably will. This is the man who revolutionized the voiceover of the modern movie trailer. Think back to any 80's action movie trailer going:"In a world where...etc etc...; one man can do the job(/fight back/bring justice/etc.)". It'll be him. Not confined to any single genre or media, this mans voice has been unavoidable in popular(and not so popular) culture for the last 40 years.
Let's go for some examples:
Commando(seriously, don't miss this trailer, it's pure art):http://www.youtube.com/watch?v=mh-QUh69MCg
If trailers just don't sound right in future films, you now know why.