Peak oil is coming, and may be happening already.  It's a process that
will take years, and is really more of a plateau than a peak as viewed
in the short term.  As traditional oil sources peak out, the price is
driven up, making alternative sources such as oil sands commercially
viable.  That then increases supply temporarily, forstalling the
inevitable decline in production.

As long as we avoid another early-90s type price crash (and I'm pretty
sure the big oil companies have that covered), companies such as
Suncor will continue to increase in value.