i did hope so, too. until nokia came up with "contacts on ovi" (formerly nokia chat). while this is a XMPP based service and could use the technology you describe to share locations, they chose to make this part proprietary (again). so chances are we'll see a feature like this in fremantle only as part of some ovi-service nobody'll use, but not the way we would want to.

remember, as somebody who does have friends who would like to share their locations, you need to choose now between:
nokia friend view
google latitude
contacts on ovi
any location-sharing XMPP-server
...and a few other services that exist as mainly web-based solutions

so when i'm on nokia friend view, my google latitude friends won't see me, neither will somebody with contacts on ovi.

in order to make location sharing happen, we need to have one standard that ensures interoperability. using a tablet and knowing about the power of openness, i'd say jabber-based location sharing is this standard. but of course nokia is much wiser...