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Understood, but I don't know why Samsung put this out. It's pretty crummy and doesn't really show off the unique features all that well. The Gizmodo one actually looks much more like a promotional piece from Samsung and does a much better job of showing off the device and its unique new features in an exciting way.
1 year, 5 months ago on Samsung Releases Video Giving Demo Of Galaxy S 4 Software Features
Gizmodo's hands-on is actually much, much better: http://gizmodo.com/5990644/samsung-galaxy-s-iv-hands-on-everything-new-is-old-again