With the Galaxy S8, Samsung was looking to stand out in three key ways. It wanted a futuristic design that looked different from the sea of similar looking devices. It wanted to compete with Apple's Siri and Google's Assistant with its own AI assistant. And of course, it wanted a robust device that wouldn't have the safety issues that cratered the Galaxy Note 7.
Our take: It succeeded on the first, stumbled some on the second and the third remains to be seen.