Point vs Range/Area Selectors?

Dear all,

Recently in a matrix of functionalities provided by different annotation
systems, I saw an entry:
* Point Based Selection

This was distinguished as a single point in an image (eg x,y but 0 w and h)
or a single position in a text stream (eg a selector with an offset, but 0
length)

Is it important in the Open Annotation model to have Point selectors, or
should we have a recommendation in the specification to use the range/area
selectors with 0 height/width/length?

Thanks for your thoughts on this!

Rob