Their styling makes it quite clear they're going after the Beats crowd giving the impression they're as concerned about sound quality as Monster was when they designed the Beats in the first place. Plus there doesn't appear to be room for that pad sound dampening system. I don't think these are Foster units. If these come to fruition someone else might pick up the design from Foster, or them might start marketing them as Fostex phones. And I still remain unconvinced that these are for real, those photos would have been taken at a trade show but still no other information about them?
The HD800 doesn't photograph well. It looks fine in videos but it's a bit of a mess in stills. They also don't give that "colorful all plastic" feeling that a lot of other bad looking headphones have.
A $1500 headphone the size of your head. I don't think that's the beats crowd.
Also, Senn has never been the epitome of quality aesthetic design (to put it lightly). I don't see the HD800 or HD700 as that far from any of their other headphones.