Are visual tracking and visual recognition technologies being used
more frequently to monitor consumer behaviour in the retail industry? 
(E.g. Brickstream,
Accenture Visual Tracking)

I don't think that the technology has been mature enough to be tested
in to the real world.Most of The computer vision private and public
research such as human traking and recognition are at their very early
stage.Even though Face traking,human tracking and face recognition has
been somewhat more advance in the recent years it still not dificult
to find a suitabe business model to integrete,exept security.
I would say underestanding human behiavior through a learing machine
is not ready yet.and if anybody claims he owns that technology,It is
surtainely not fiable nor ready for applications.