In favour:
http://www.bloomberg.com/bw/articles/2014-12-22/canadas-oil-sands-are-better-bets-than-shale-oil
Against/doom:
http://www.theglobeandmail.com/report-on-business/industry-news/energy-and-resources/alberta-oil-sands-investment-slowing-down-after-price-collapse/article24470585/