This is hardly just some blog post though mate, it's a big fat thing right on their official site:
http://www.samsung.com/no/isthisthenext/
And of course those three pics aren't supposed to show any real device, they're just stylized and I guess intended as parodies of typical "rumor" leaks, to give the S6 features a fun spin. And if those features weren't real, why would they tease about them on their official page just to then let people down one week later?
This paired with the
"six appeal" pic right on T-Mobiles official site IMO makes it not too remote a possibility that the device actually has a screen that's curved on both sides + the front facing speakers and some special gimmick that is supposed to make it extra durable.
BUT my bet is there's also a more standard version coming, and that's the one we see in the Spigen case leaks etc.