first thing, Dennis Kimetto, how tall is he?
the guy is not small and has some muscle.
lung rib cage is almost wild in proportion.
he has decent upper legs and high calves good for speed.
can't tell much about the inseam from photos.
low brow iaaf profile lists nothing about height and weight.
in any case kimetto is a superb specimen.
regarding the 2 hour marathon, no doubt bekele could run 57 something for the half marathon at peak, which means 60 minute halves are possible with excellent pacing.
old man bekele might run 202 low. we'll see.
there is no reason, no reason what so ever someone will not run under 2 hours.