Is IDReferencePropertyAttribute really important?

Hello...

I have programmed a Validator control that besides ControlToValidate property I added a ControlToValidateDV property which will contain the ID of another TextBox control.

I marked that property with TypeConverter(typeof(ValidatedControlConverter)) which provides a list of ID's of all the controls in the page.

Whether I use IDReferenceProperty or not, that list is shown corrrectly, so I am wondering what is the real importance of that attribute.

Thanks

Jaime