After promising an Ice Cream Sandwich update for the Galaxy S, Samsung had to take back its words after they found that the device was unable to run the new OS (never mind the fact that the Nexus S runs it fine despite having the same basic hardware).

Later, Samsung promised to bring a value pack to the Galaxy S, which would essentially be Gingerbread but infused with some of the features from Android 4.0, such as face unlock. After a while though, even that plan was cancelled as the phone's hardware was once again shown to be less than adequate. However, a firmware with the so called value pack did leak later but that was the last we heard of it, until now.
Samsung has now officially started rolling out the value pack for the Galaxy S owners in Korea. This new update adds features such as face unlock, image editor, ability to take pictures while video recording and create folders in the launcher, etc.
It remains to be seen when this update will be made available to users in other regions, if at all.
Source (Translated)

Face unlock for Samsung Galaxy S requires blinking, is better than ICS face unlock
After some hesitation, Samsung
is finally delivering the promised Value pack update for the original Galaxy S. The new firmware adds some Ice Cream Sandwich features to the Gingerbread-tasting Galaxy, including Face unlock.

It turns out, though, the Face unlock is actually better than the one present in the stock Android ICS, which is easy to bypass with a photo. Samsung’s team responsible for the value pack heard those concerns and made this unlock option more secure.
The solution is very clever in its simplicity – the user has to blink before the phone would unlock. And that’s not something a photo can do.
Sure, it can still be bypassed – with a video – but it’s much harder to do, while it doesn’t complicate the unlock procedure much (people blink all the time anyway).
The Value pack is currently rolling out in Korea, but it’s still unclear when it will reach the rest of the world. Officially that is, as the leaked Value pack firmware was made available pretty quickly through unofficial channels.

Source | Via