It is a GM controlled divination. It fits the theme of witches from literature quite well. How useful it is depends on your GM, since he has full control over whether the vision relates to something you care about.
If I am making a witch, it's not one of the first three hexes I am taking. If I trust my GM to make it useful, I might take it later, once I have established things to do in combat.
It is probably more useful on an NPC as a way for the GM to use foreshadowing.
It's probably on the scale of comprehend languages. If I only have one first level spell slot, I am not memorizing Comprehend Languages unless I know that it will be critical that day. However, on occasion, it is a useful.
I imagine you could make a pretty good living as a fortune teller, you'd pretty much put Harrow readers and the like out of buisness. I imagine however there might be repercussions for showing alot of people in a local area a glimpse of their possible future.