The Galaxy S8 and S8 Plus are official, but they are not yet available. Some retailers and carriers started shipping the phones, but you'll have to wait for a few more days or weeks, since the demand is very high. With those two devices out, Samsung has turned its focus on the Galaxy Note 8, which they need to make perfect after the Note 7 scandal.
There has been various rumours and leaks about the Galaxy Note 8 and the new renders are based on leaked information. It is pretty safe to assume that the phablet will feature an Infinity Display and not much will be different compared to the Galaxy S8. There will be some improvements, like in-screen fingerprint scanner, dual rear cameras and stereo speakers. Obviously, there will be support for S-Pen. Until we get first live images, enjoy these concept renders.