Still very uncomfortable with this view.
Metadata gains utility when it's surrounded by a structure that encourages exploration and manipulation.
It's going to be very hard to convince me that a marker - essentially a fixed information storage point in time - will ever be able to assist the educated editor in a fashion equivalent to a system of tagged ranges that can not just "mark" - but concatenate, separate, overlap, exclude, aggregate and recall content - from a single frame( like the marker) to an entire scene capture - and let the editor tag and retrieve the groupings instantly and at will.
One of those concepts is NOT like the other.
And one, IMO is simply rationally much more flexible and powerful.
My 2 cents.
Creator of XinTwo -
http://www.xintwo.com
The shortest path to FCP X mastery.