We haven't seen much of the Tizen operating system that Samsung and Intel have been developing, but a few hands-on videos that have appeared online make it appear as though as though we've seen it before. That's because the design has so much in common with the Touchwiz user experience found on Samsung's Android devices. Though the icon choices differ in some regards, it's hard not to draw a direct line based on the similarities seen in the videos below.
Engadget has a hands-on video that shows Tizen looking pretty different, but there are still shades of Touchwiz in the camera app. Both videos show an interesting OS, but the version seen in Engadget's hands-on looks a little better to me. I must admit that I'm interested in both versions because of things like the way that "Dynamic Boxes" (widgets) expand into having a flipped view. However, I don't see anything in particular to make me think this would offer something that better than what someone can get from Android. You have to start somewhere, so maybe Tizen will mature into something more compelling than a phone that reminds me of a Galaxy device.