We talked on IRC for a short while already, but perhaps this can help.
The [[*alias]] resource field only holds the actual alias, and doesn’t render a full link.
A possible use for this (which of course would better be done using the ID, but still...) was using an image on a resource page.
<img src="assets/images/pagespecific/icon_[[*alias]].png" alt="Bla" />
Another use of the alias field I can imagine right now is when you have a resource which contains a snippet to look up, say, store information where a storename or id is passed through the link. Links you make to that store comes in a beautiful /store/1234-wicked-store.html format, which of course renders a 404... unless you’d put a plugin to that cause which sends it forward to a resource with the alias of "store" with 1234 as query parameter.
All in all, just use [[~[[*id]]]].