Samsung is one of the biggest phone manufacturers out there and they have just released a teaser video for their upcoming Galaxy S IV which will be revealed on March the 14th at an event in New York. The reveal of the new phone is one of the most important events of the year due to Samsung's domination of the Android space. The new device will also go head to head with Apple's iPhone 5 and their upcoming iPhone 5S or iPhone 6 devices.
As you can see, the video doesn't show anything related to the phone besides the already-seen event invitation, but it certainly does show one thing: Samsung are finally getting good at commercials and engaging their target audience.
The biggest rumors relating to the new phone are about a brand new 1080p display as well as a custom made 8-core Exynos processor. According to these same rumors the Galaxy S IV will first launch in Europe and then come to the US afterwards, similar to the Galaxy S III launch. However that is still just speculation and the truth along with further details will be revealed at the event.
Source: Samsung (Youtube)