According to Sam Mobile the Lollipop update has already arrived for several Samsung Galaxy phones including the Galaxy S5 and S4, Galaxy Note 4, Note 3 and others.
It looks like Galaxy S4 mini may not receive it and while the Galaxy Alpha missed out on an earlier appearance of the update for Q1, it looks like Android 5.0.2 Lollipop is finally making its way to the handset.
So far the update has only been seen on three major South Korean carriers and there is no indication when it will be appearing in the West. Normally it is a few weeks after the Eastern release.
Over the air
It's available there as an over-the-air update or via Samsung Kies, and is the same version as the update for the above devices, with the new Material Design and refreshed UI.
The upgrade is worth having because it will bring performance optimisations and notifications improvements, and enhanced battery life.