Is the 'shark wheel' a good idea for a bicycle?
On a skate board type application it is effective 

On a bicycle it is not effective and impractical to implement



On a skate board you want a wide contact patch. On a skate board you absolutely don't want the wheel to tilt.  The idea is to keep the width but reduce contact area.  The reduced contact patch has lower rolling resistance. Within the virtual flat contact surface are circular surfaces that will shed debris (small rocks).  They can also can go with softer material so you give back on rolling resistance but get softer ride and more grip.  They are not taking over the skate board market but they have a niche and it may grow to dominate.  It is more than just a fad with no real value.  And some people  will buy it because it looks cool.

Basically none of that scales to bicycle.


A bicycle leans and as soon as you lean a shark wheel it is no
longer round.
That is a show stopper.
Even if it stayed round on a lean the extra width on a bicycle with comes
at large expense. 
A spoke type design would not work.  Would need a solid wheel.
Would have to be a solid tire.  Pneumatic would push the tire off a curved rim and put stress on the rim.