What shall we do when they don't come to pass?
"But the prophet who presumes to speak a word in My name, which I have not commanded him to speak, or who speaks in the name of other gods, that prophet shall die." (Deut. 18:20)
"The prophets prophesy lies in My name. I have not sent them, commanded them, nor spoken to them; they prophesy to you a false vision, divination, a worthless thing, and the deceit of their heart. ... And the people to whom they prophesy shall be cast out in the streets of Jerusalem because of the famine and the sword; they will have no one to bury them--them nor their wives, their sons nor their daughters -- for I will pour their wickedness on them." (Jer. 14:14,16)
I believe there are a number of prophetic voices today who have been accurate. I can't speak for those I don't know or whose prophetic words haven't yet come to pass. Prophecy can come immediately or take years.