I'm sure it is a distinctive product because of it usefulness, and it will became indispensable in any genealogy program!
I have now over 1300 people in my family tree with the help of cousins and cousins of my cousins. This is great, but of course many of this cousins (and other I don't know) create their own trees. This has the potential to create a huge amount of (useless?) duplicates.
It would be great if we could merge/link trees, increasing enormously the amount of family links, saving a lot of effort and a lot of space on disk (somewhere). For a start, a simple link to another tree would be good, as an option following the smart match.
Here at MyHeritage, we have a few linking features:
When smart matching is processed on your tree, and your family tree and another tree are connected, both the owners are informed, and benefit from the opportunity to collaborate and learn from each other. Merging the information gained from a Smart Match is a Premium feature.
If you would like to actually merge two trees together you can do that as well, please see here:
Something like that would be nice, but there would still have to be a way of getting permission from each tree administrator in order to access their tree. Due to the privacy constraints, it just doesn't seem possible.