Since becoming open source, it has become possible to find out potential upcoming features in Xamarin Forms by just poking around the active branches in the repository (macOS support was visible in the repo before any announcement).
One of them is lv2spike.
From just reading the commit messages, it seems this is a new CollectionView, based on UICollectionView for iOS and RecyclerView for Android.
This is something that has been needed for a while, but is a big enough undertaking that I understand why it has taken a while. After all the branch suggests this is still just a spike.
There are quite a lot of feature requests for the Xamarin Forms ListView that are just not possible (like this one for horizontal layout) mainly because the iOS implementation is based on UITableView. This will open lots of possibilities. My biggest concern is that despite the push forward with features, Xamarin Forms is accruing bugs even faster, and with the expanded platform support this could just get worse…