Bike porn

So whats all this about then?

...some sort of quill-a-head?

its just an ahead upside down, and it's bloody good idea.. love it. cleans up the bar area .

it loooks like the stem and steerer tube are brazed together in one piece.

As is always the case, It's been done before.
Pace research did the exact same thing on the very first RC 1OO mtb over 2Oyrs ago, before aheadsets were even invented.